My first post too. Saw the OP and thought I'd give some advice.
First of all, don't listen to guys like JohnyTheArrow. They don't have the mental/emotional capacity to comprehend the problem and resort to kicking you while you are down to make themselves feel better about their own pathetic lives.
Basically Pandora, I know exactly what you are going through at the moment. I have had a similar experience.
In those two months, she came into your life and blew you away, not only with how hot she was but also how you connected on a mental and emotional level. It was like a drug in the aspect that you kept wanting more but knowing it was bad for you. She kept you happy with affection and passion but then would destroy your confidence by always making you jealous and/or second guess yourself. You always knew she was talking to 'other guys' but she played it off by making you sound jealous and out to be the bad guy.
The fact of the matter will be that she was keeping these guys strung along. Maybe not to the point of physically cheating but definitely to the point of having them as a back up.
You see, most of these girls have abandonment issues. If it falls over with you, they need someone else to fill that void. So chances are she is sleeping with someone else now, if for nothing else but to make her feel better about herself. This will be a recurring theme throughout her life. Never actually being fulfilled because she's always pushing away people and falling back on others. She'll do the same thing to the guy she has fallen back on as she did to you.
Now. The hardest stage is the stage you're in now. When I was with a girl like this, I kept going back. A lot of this is due to the fact that she had destroyed my self confidence to the stage where I thought I couldn't do any better. I even found out she cheated on me and in the state I was in, I went back.
Now. The best thing I can recommend is not going back. You know it's never going to work out long term. And even though you think it'll just be 'meaningless sex', I guarantee that she'll suck you right back in to where you don't want to be.
It'll be hard for a while, but the big thing is to build up your confidence again through exercise or whatever makes you happy, and then attacking it from there. Don't judge the next girl on the last. You may never feel that rush again, but at the same time you won't have to go through the heartache to get that rush either. It's just not worth it.
