I'm sorry you've gone through something like that too.
You're right... The problem is that sometimes I feel like I never learn. I keep repeating the same mistakes and engaging with people that end up taking advantage of me in some way, (and then I feel stupid for letting them treat me like that).
I don't know, right now I feel like I can't get close to anyone. I think I need to work on forgiving myself and learning how to trust myself, before I can trust anyone else.