>>82430878 (OP)
just never introduce your gf or any girl you're dating to your male friends.
she can meet them when you're engaged.
Or only meet other friends who have girlfriends and meet up together as groups of couples for dinner parties or whatever.
I ruined the beginning of a fling by thinking that when she came to visit me at my university we should drink together with my friends at university in order to prove to her that I'm a normal person and have friends.
I didn't get cucked or anything but it was really awkward because one of the friend group who had a problem with me started cursing me out in front of her and it gave her the ick. We hung out the rest of the weekend and had sex a few more times but it wasn't as good as the first day she arrived and after she left she went stopped responding.
girls claim to want to meet a man's friends but don't listen to them.