Best ways to cope with anger?

How old are you? I ask because after a certain age hitting becomes less legal(Well its worse).

Friends should never dates exes, come on, thats a dick move seriously.

Join the gym, work out, get ripped, and know you're better than he is.

Get smitten with his sister. Watch his face as he catches you both in bed. :P

The way used to is by hitting the wall with my fist.
Then the wall said no more and broke my hand (:
So not recommend.

go to the gym. exercise, work out.

go running

tldr knock him the fuck out!

Destroy your pillow :)
Have a talk with your friend. If he continues being a prick, let it go and assume it's for the better (at least you don't have to waste any more time on them if this is the case).
And if you want to piss him off, just remind him that you've been there first ;) "My hand's already had a piece of that, MREOW~. Btw, I kissed those lips; enjoy kissing them now."

First, figure out WHY you're angry. Anger is usually an instinctual (old brain, fight/flight) reaction to being either hurt or scared. My guess, based on this thread, is that you're the former, but perhaps a little of both.

Then, as one other poster mentioned, directly tell him earnestly, without defensiveness how he made you feel. e.g. "Hey Roger, you really hurt me when you X, Y, and Z."

From there, it's his to either own and discuss with you like an adult, or be defensive and ugly. If he chooses the latter, chances are pretty good that he's got some hurt or scared himself. Quite likely both for him, IMO. But that's not fodder to jump on him. It's a realization that we all get hurt and scared and react destructively in different ways.

If he "let's you back in", then y'all have to have some hard conversations where you both have to listen to one another and work it out.

If he continues to be unapproachable, defiant and destructive, then my advice is as others. Employ yourself with positive endeavors. Set a new goal for yourself and start to work toward it. Try and forgive both of them ASAP and know that they are weak and scared like most of us. Hope they figure it out on their own.

Be the higher-ground, act to be the better man.

Believe me, it took me WAY too long in life to realize these things are what to strive for. Prior to that, I did things to those I loved because I was scared and hurt, and it was NEVER worth it.

edit: After thinking about it some more, I think he may be scared you're still a viable option for her (obvious), but may also be hurt and angry at himself for cutting you off. His "solution" is to tell himself that it's going to be all or nothing with you (and he probably learned that somewhere, incorrectly) and if it's going to be nothing, then he's going to self-justify some pretty ugly behavior to make sure he doesn't have to face the fact that he's hurt you. But I don't know the guy. Perhaps he's just a sociopath. If he's normal emotionally, then there are good reasons why he would be doing bad things.

don't get angry

Honestly, if you feel like hitting the shit out of him, that may the thing you need to do... You decide if I am kidding or not :)
But anyway, just do your usual stuff and try not to think about it, I understand it sucks and you should definetely question if he is a friend after all, moves like this are just... well, gently put... uh oh, no idea how to say it gently, but I am pretty sure you understood :D

Anger is something that has not disappeared from people despite thousands upon thousands of years of evolution.
Practice psychology on yourself and rid yourself of anger. I don't get mad anymore, at all.

Sounds like something that happened to me at 16, friend got with my ex around me ended up getting into a fight still friends to this day 10 years later. Shit happens just don't stress about it.

Play Worms. Make custom teams and name the one set of worms all the people that annoy you. Then find hilarious and awesome ways to blow them up with the other team.

Break stuff

Keep it all inside until you just cant take it anymore and kill everyone

One of your close friends just betrayed your trust. That anger is normal.

You don't have to be a perfect bastion of maturity, here. You're hurting, and he's adding to your hurt for his own personal ends. If he ever gets in your face, what you do in the moment is up to you. By all means, try to be the better man, but life is for living. Live it so that you don't end up with regrets. While that typically means "Don't do something dumb enough to get you a criminal record" and that totally applies here, it may also mean that the next time your friend starts carelessly rubbing salt in your wounds just to try increase his chances with your ex-girlfriend, you may feel the urge retaliate in turn. While I would normally advocate the mature approach, I don't know you, or what will give you the most lasting closure. Only you know that.

Besides, let's face it, if he randomly betrayed you just because he felt attraction towards someone he hasn't known more than 3 months? He wasn't REALLY a friend to you, was he? Just a fair-weather acquaintance. He would have turned on you eventually, it's just a matter of when, and what over. Look at this way : It's better than he showed his true colours now, rather than later down the line when it may have been over something more important or damaging.

You and your ex obviously broke up for a reason. As hard as it is, you should try not to think about "what did I do wrong?" and "what did she do wrong?". In the end, a couple can be 100% compatible and have all the best threads of common interest, they can be as mature and as chill as an arctic mojito, but shit can still happen. That's the nature of relationships, there is no such thing as a perfectly smooth one. It takes months to fully let go of someone if you really cared about them, sometimes longer. I think you need to give yourself chance to clear your head and go through the entire heartbreak process, and be careful not to let your ex-friend become a scapegoat.

Perhaps, when your head is in a better place, and hopefully once your friend has stopped being such a douche, you need to talk. Like, just you and him. Even if it means you end up yelling, you need to seriously try to clear the air and have a straight-up talk. GOOD friends don't automatically agree with everything you say or do, and won't be afraid to disagree, but there is a line between stern disagreement and betrayal. You need to work out if he just disagrees with how your relationship ended, or whether he is actually trying to get in on her rebound. Until you've gone through most of your heartache, that'll be nearly impossible to tell.

Just remember to live life without regrets, even if that means you get into a yelling match or physically fighting with your friend, but just make sure you think it through before you go looking for trouble, and don't land yourself in the shit with the police. Breathe deep, and before you do anything, ask yourself with honesty : "Am I too charged to think straight, right now?". If the answer is yes, put it off for another day, and keep doing that until you can honestly say "Okay, I'm chill now, It's time to see if I can work something out".

Life isn't easy, and there are seldom any straight-up "right" paths to take. Follow your heart, but only once you're certain it isn't being betrayed by itself.

Also, "Best ways to cope with anger?"

Two words : Bob Marley

Start counseling with a professional (LPC). Avoidance mechanisms, such as video games, only provide temporary catharsis but do not address the source of anger.

cry n raeg an play COD. dats wat i do wen someone taks something dat belogs to ME!!!!!11:-)

Probably just a coincidence, but do you live in Akron, Ohio, USA? I know someone who is just now going through the same thing. I know it's a long shot but I have to ask.

Do as i did, punch the guy until you break your hand ;D

Hammer sixeteen nails into your spine.

Just beat the living shit out of him.

hire a super hot escort and tell her to pretend to be your date. make a double date with those 2 douchebags (you have to insist).

Ask male douchebag if he wants to trade, if he does not agree then just give him the escort for free.

Tell him a month later that you were not in a relationship with that girl and she might be HIV positive.

You might also ask "why 1 month?" so that male douchebag could hook up with female douchebag at least once in that 1 month.

I have a question, is she in any way involved with him? Why does he suddenly go crazy on you? Where did that come from, is it from your ex (did she influence him in somehow) or is it all him who decided to be some sort of backstabbing Games of Thrones character?

He seriously has issues if he goes all loco on his best friend for a girl =/

I don't know if he tried hitting on her, but generally, that is frowned upon between friends. It might also be some sort of phase, from which he will recover, but I would still ignore him and break all contact. I don't think I would be able to ever truly trust someone if they could go turncoat just like that.

Krav Maga actually makes use of agression (the part which I had a problem with, because I am too mild/relaxed), but I am not sure if it is a good idea to learn how to use your anger to beat someone up ;)

Or create a SG group and ask the members to slap your friend silly ;)

I like to play The Binding of Isaac with some heavy metal running in the background, not just to cope with my anger, but also just to get away from the world in 30 minutes to an hour. After that I normally feel refreshed or cleanesed or some shit like that