<human>: To start:

The relationship was a tumultuous, intense, and codependent three months.  The moment we started dating she moved into my apartment, and we had all classes and study time together, so it was a 24/7 environment.

She has a lot of issues I don't need to really get into, but she was diagnosed as a narcissist by a psychologist, and looking back it's painfully obvious.  Selfishness, self entitlement, and a total lack of interest in me as a person were cornerstones of the relationship.

I stuck with it because before we got together I was lonely, and she was into the same things I was, sexually.  We're both very kinky, so it just fit, and that was the only time we ever could agree.  Fights fell away once we got to the bedroom, but were never resolved.

Regardless she broke up with me while we were driving across the country together, and I then spent the summer alone on the opposite side of the country from family and friends.  I told her not to contact me in any way, which she didn't, but we have class together, so I knew that would come to an end.

I got back to school and was immediately stressed out and anxious.  She asked if we could talk to get rid of the "awkwardness" in which time she left hints of all the guys she slept with over the summer (I should mention before we dated she was sleeping with multiple people per week).  Honestly the entire conversation felt her rubbing in how awesome her life is without me, and how much I held her back...from casual sex?

I saw a therapist on the east coast, and I'm starting with one over here, but I don't know how to not feel anger and hatred when I see her. She tormented me through the relationship, and obviously showed I didn't mean anything to her.  I want to stop caring, and I want to move the hell on.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I see my ex multiple times per week, and it causes me huge stress and anxiety, how do I cope and move forward?