No wonder you have trust issues! This girl has shown you over and over that she is very untrustworthy. You are right not to be suspicious of her, and you cannot trust her. She is going to bring you a world of hurt if you ignore these red flags and stay. BOUNDARIES. Sorely lacking. For you, too.

Beware of people who try to make out like their transgressions and issues are actually yours (what she's doing). Having weak (or no) boundaries with people who are willing to abuse your trust and take advantage of you will cause you a lot of pain and trouble unless you work on them.