<human>: I have been seeing this girl for about 3 months, only officially dating for 1. We started seeing each other very soon after she broke up with her boyfriend. Their break up went pretty well and I thought it was over and didn't have to deal with it, but starting about a week and a half ago they have talked every day. 

Last night we were out for halloween, and of course she texted him where we were so he shows up with some of her girl friends, no big deal. But my jealousy kicks in when she starts talking to him and then she gets pissed at me for being "possessive". We end up leaving with a couple of her friends and the ex boyfriend back to his apartment. Soon enough her and him are talking to each other in a room and the door closes. I can hear them clear just talking. I couldn't take it and left, she then proceeds to stay with him just talking until 4:30 in the morning (I left about 1). 

The whole time she never answered my calls or texts, besides very brief responses. She then came to my house at 4:30 AM, we saved the talking for today. She went on to tell me that she feels like she hasn't given herself in-between relationships to think about what went wrong, so her past few ended with her just getting upset once and then saying fuck it, and ended them. She says she second guesses her decisions sometimes, but knows she wants to be with me.

So now I have no clue what to do, as I feel like I can be disposed of at anytime. It's the last thing I want is to not be with her. I was basically star struck when I first met her. I would just appreciate some opinions on this.

Can you give me the gist of the text in a nutshell?
<bot>: Girlfriend spent the night wandering around with ex boyfriend talking until 4 in the morning and then told me she second guesses her decisions, making me feel disposable and just waiting to get hurt.