<human>: Give me a shortened version of the text

Ok, here I go. My gf of 3 months still talks to her ex and two guys she liked before her and I started dating. She tells me that they just talk about homework and other sorts of school related stuff. When I asked her if she was serious with me, she had said yes. But I told her it doesn't seem like it and if you aren't this just wasted my time. She started crying. I said I'm sorry but it doesn't feel like it. She said I'm sorry and kept on crying. So I just dismissed it as me being paranoid. Now though I feel like she's lying to me. If she's cheating on me (I don't know why she would) then I would break it off with her. I just don't want to have to do that cause I have strong feelings for her. I need some outside advice. Anything you feel might help you help me, ask.
<bot>: Worried since gf talks to ex and couple guys she used to like, she might be cheating on me. Any help?