User didn't give me Feedback in trade.

i think another user doesnt need to trade feedback if he doesnt want to? (correct me if im wrong)

https://www.steamgifts.com/account/trades/feedback

It's not mandatory to give one so all you can do is delete the feedback you left

First, are you talking about the Steam profile or the Steam Gifts one?
Because +rep on Steam profiles is less than useless, as everyone can just delete negative comments.

Second, is he (or she) even registered here? Trade feedback here is more important, but of course, one needs to be registered first.
Also, as stated above, leaving trade feedback is not strictly required, while leaving feedback without having traded is frowned upon.

I dont say he (or she) MUST leave Feedback. Only I want to know if he forgot to leave a Feedback here on SteamGifts (in Steam profile too but its not important). Of course he/she have a SteamGifts profile (more than 200 positive Feedbacks) but maybe forgot hace me Feedback. My question its really simple. Can I see my given Feedback to another users in order to contact with him/her? Thanks all!

Thanks to TempeteJoachim! Its what I was looking for!