If he's as manipulative as what it sounds like, and she's as naive as she sounds like - I could easily believe he did rape her and she is still talking to him. She sounds like she still has some kind of "feelings" for him (if she still talks to him on phone, hangs out with him in a miniskirt, and gets drunk with him) and probably made up excuses for him like "Oh he was just drunk.. it was my fault for dressing so sexy" etc etc... who knows.
Sadly, not all girls have as much common sense and self-respect as you wonderful ladies here on LF :)