I have never posted in this sub before, but I feel that people in most other subs will be too naive with this situation. So here goes. My girl has this guy friend (she's known him longer than she's known me) whom she occasionally hangs out with. She has hung out with him alone in the park at night several times, which makes me uncomfortable. She also went swimming with him in a public lake once. Now, I don't think she is or has cheated on me, but my fear is that this kind of one on one hanging out can lead to romantic feelings for eachother. I don't know what this other dude's intentions are; never met him before. This has happened with 3 of her other guy friends since we started dating (we've been together for 15 months). Same exact story, except all 3 eventually admitted over text to having romantic intentions. She politely broke off contact with them each time this occured. So now there's one guy friend left. She tells me he doesn't seem to want to be anything more than a friend, and that she would never give in and compromise our relationship if he ever tried anything. But I'm still a bit worried. Am I being insecure? She's never given me a reason not to trust her, but I just want to be careful because this relationship has been going so well so far, and I don't want it to get ruined because of some guy.