<human>: Give me the gist of the text in a nutshell

23/m my girlfriend 20/m and I are going through a rough stage/episode right now. It's def all my fault but I am trying to fix this and at this point I don't even know if its worth it for a few reasons.  Let me start off by saying I kissed another girl about 9 months ago and told one friend, lets call him Steve. Steve and my girlfriend become friends. I felt so awful about kissing the other girl and I told Steve that. Steve was like don't worry about it, it was just a kiss, don't tell her. I didn't tell her, but I still felt bad. About 2 weeks ago Steve tells her that I cheated. I own up and tell her everything that happened and that I haven't contacted her since and that I regretted it. We have a semi long distance relationship, we are about two hours away from each other. I text Steve asking him if he told my girlfriend about what happened. He declines, which is BS because he is the only person I told. She ends up telling her parents which is why I'm hesitant in the first place to try and make things work. I found out today that she masturbated with Steve over Skype last night - They don't know that I know this. I text Steve asking "are we cool. He replies really fast saying if this is about your girl then I don't want to be a part of it, it's awkward to be in the middle of it, and that he doesn't want to be the bridge between my girl and I and he doesn't feel like doing any favors. I replied saying "I just wanted to know if we're cool. Did something happen?" He say "Yeah everything is cool. What's up?" Steve is in a relationship and I'm pretty sure his girlfriend doesn't know what happened. I def considered telling his girlfriend but I'm not going to do that. Am I over thinking everything or just move on and stop trying? We just crossed over the 3 year mark. A lot of things have happened since we've been together. I completed my undergrad, and started working the 9 to 5 corporate life. She is a sophomore in college.
<bot>: Friend advised not to tell girlfriend about kissing another girl, he did. Girlfriend masturbated over skype with friend and told her parents I cheated on her. Should I keep trying or just move on?