Hello -bby Mely-: My thinking on this is that, realistically, there's no way to know for sure what's going on between your male friend & your girlfriend. Time will tell. What you do have control over is your own reaction to the situation.

You said you had decided this man is not someone you would want to develop a relationship with. So my thought would be to simply let happen whatever is going to happen, if anything, between your two friends & move on. Yes, it's possible you're experiencing a twinge of jealousy yourself. That's just human nature. Simply acknowledge it, breathe into it, perhaps smile to it, & allow it to be there until it fades of its own accord. This is a practice that is referred to as "compassionate abiding". Here's a link to a nice description of it:

https://mindsetdoc.wordpress.com/201...e-abiding-101/

I see this is your first post here on PC. So... welcome to PsychCentral! I hope you find the time you spend here to be of benefit.

I don't know, of course, if you're here simply seeking advice with regard to this particular concern or if you plan to continue posting. However, should you be planning to continue on (we hope you do)... may I suggest you introduce yourself over on PC's New Member Introductions forum? Here's a link:

https://forums.psychcentral.com/new-...introductions/

There's a lot of support that can be available here on PC. The more you post, & reply to other members' posts, the more a part of the community you will become. Plus there are the chat rooms where you'll be able to interact with other PC members in real time (once your first 5 posts have been reviewed & approved.) So please keep posting!