<human>: Let me elaborate. My girlfriend and I love each other unconditionally and would never cheat on each other. My buddy and I go back for years, but he fucked me over with a girl once several years back that I really liked at the time. Made a move on her behind my back. He currently is going out with this girl.
Said friend recently transferred to mine and my GF's college, which I am a transfer student and am not always around. He doesn't know anyone and I assume wants to meet people via my girlfriend. But how do I know he won't do what he did in the past?

Give me the gist of the text in a nutshell
<bot>: Friend with a history of taking my girl wants to hang out with my current GF. Am I being paranoid or should I not be worried. Why?