She's my girlfriend (exclusive) and it's honestly not a huge deal. I don't give a fuck if guys buy her drinks or ask her to dance (she doesn't dance with them), and making her feel sexy is something that both I and other guys do.

Before we started dating she had a fwb situation with a dude in her friend group, and everytime they get drunk (as group) he consistently asks her to sleep with him. They hung out as a group this past week and he asked her 3 or 4 times to go to "sleep" with him, obviously sex implied. She has all of my trust and I'm not worried about that, I'm just not sure how to handle the situation. Jokingly (idk if i need to stress that enough) teased that I could pull the "big bad boyfriend card" if need be, to which she said she could handle it.

Not my position to tell her to stop going to these parties obviously, I'm just not a fan of this dude knowing she's got a boyfriend and consistently trying to sleep with her anyways.

I'm just a little stressed (I've been out of town for 5 weeks and fly back in like 5 days) and i'm 99% the best way to handle this is to just continue to be the "alpha" and keep her invested in me, essentially not reacting.

Also where do you guys draw that line? I feel like allowing guys to buy her drinks/chat her up is all good knowing I'm the one taking her home to fuck her at the end of the night, but do you draw the line with guys touching the girls you're dating? 2nd relationship and this girls awesome, and I'm not trying to come off as controlling/jealous.