Girlfriend cheating with other girls.
My girlfriend and I have past history and recently started dating again, after I finally forgave her for cheating in the past. It began thus time as a long distance relationship, until she moved closer to me... When she moved closer, she stayed at my place for a month so that she could find a job to pay for the place she had picked out. The entire time she was staying at my place, she was looked after well - I even paid her first months rent...
(She was living with me until aug 1, when she moved into her place)
About 6 days ago, I found out that she had answered an ad on craigslist, speaking in detail about physically being intimate with another woman that can "keep it under wraps". I was even mentioned in the email, saying that she didn't want to talk to me about it.
The reality of it is that her and I have had discussions about her bi sexuality, and I made it clear to her that I was not comforable with her being with women as well as me - but she did it anyway.
The real kicker of the whole thing, she replied to the craigslist ad on July 31, while she was still living in my house, using my computer to send it... The day before she got her own place.
I'm lost and tired of obsessing over this,
What should I do?