I think it's soooo hard to know who to trust after being burned by someone we *thought* we could trust. I think it's only natural to be more guarded after a betrayal and to be more careful about what we share and with whom. I guess the only thing to do is go slow and follow our instincts. You will eventually get to the point where you feel you might be able to begin to trust again. Have you talked to a T about what happened? They can be hard to trust too, but I'm sure you could find a good T to help you. That might be a good place to start.
Take care,
Darkrunner