<human>: Can you give me the gist of the text in a nutshell?

My girlfriend now ex were dating for about a month and the relationship was going really well. We are both in high school and we were nearing going all the way when out of no where she decided she didn't want a relationship. This sent me into a spiral of depression because I really like her. All of this happened last Saturday 3/14/15.

Today (3/19/15) I learned she has had a boyfriend the whole time that she does not like that much and her plan was to break up with him. I know she likes me more but idk what to do. I have been trying to figure out what to do because I want the relationship to work but I dont wanna be that guy that gets in between a relationship. So I'm here to ask what I should do in this situation? currently I want to just tell her how I feel and tell her about how I now know about the other guy. Last note all this info was given to me by her friend.
<bot>: My Ex broke up with me and she has been dating another guy from before we started dating. I want the relationship to work but dont know what to do?