<human>: Provide a brief overview of the text.

This is a throwaway for obvious reasons. So we've been dating for almost two years and I love her more than ice ever loved anyone in my life, like I want to marry this girl. We're she works there's this guy, when we first met him was a doochbag and blantley hitting in her and disrespecting me. So fast forward like 3 weeks and she ends up at her workplace with her girlfriends one night and I know he's there and I know she drive him home that night. Now I don't know if she drove her girlfriends home that night also but she might of. If she did is feel better about this but like I said I'm not sure. So I start getting suspicious and I peeked at her Facebook one night maybe like a week later and I see that they've kinda been conversing and she knows I hate this guy but she still friendly to him. And I know spying is shitty and I don't want to resort to that but I felt like something was up. So that's when I saw she drove him home. Before this she had asked me if I dropped a belt buckle in her car, I have no belt buckles so I know it's not mine but on the Facebook that she asked this same guy if it was his. I don't know what to think about this. I don't think I have any beyond a reasonable doubt proof but she has been a little different later. I know if I confront her without proof she won't trust me but I don't know what to do. Help me out, please.
<bot>: Girlfriend talking with some guy that she knows I hate and I know doesn't like me behind my back. Afraid she might have done something.