It takes time. A lot of time. You find a support system that works for you and you deal with it that way. I latched on to someone who knew me here. It became easier to be Bucky for awhile but this place likes to mess with you. I latched on to Steve and he became instrumental in me remembering... and then it took him away. You might hate hearing this but Clint offered me a place to stay and I took it. Haunting the apartment I had with Rogers wasn't helping. I was slipping.
You're right. It's different here and that can be a good thing or it can be a bad thing. And it's difficult when the person who means the most to you doesn't look at you the same way because they don't remember it.
Sometimes what really helps is taking all that anger and frustration out on someone through sparring. I did that a lot. I mean. If I was important enough to be included in a Captain America exhibit why didn't anyone look for me? They could've, at least, sent my body back to my parents. I fell off a train and fell off the face of the earth but Captain America gets multiple ongoing search parties.