In my own experiences, any of my friends who are single like me, tend to become distant once they hook up with a chick...even after swearing they'll never let themselves get involved with another woman and become such a pussy whipped idiot again.
Some of these guys become super protective of their decision, and distancing helps keep away any of their friends who may question them. I also see that the women they get involved with tend to try and pull them away from their single buddies so they can't be influenced by them, and some do it in pretty subtle and clever ways. He got drunk with me one time, i was not very drunk at all but he was arrested later. Then his girlfriend blamed me and i knew she just did this to claim more space over him.
A woman tends to keep her female friends when she enters a new relationship...in fact, the guy sometimes has to pass "shit tests" devised by her associates. I don't see this ever happening with men.
Now you cant go out with this dude anymore without his chick around. It kind of pisses me off. When you message him and ask him why he doesnt reply i think to myself how i saw myself how fast he replys to his girlfriend. Its seconds versus days. I kind of feel these kind of relations are pretty hard to keep. I feel its lame to be around the couple all the time but then again i dont have so many friends left anymore. Its a matter of what you can tolerate at this point. Many guys dont seem to have the wisdom to see this happening and to know what real friends are for. At this point i feel like its stupid to still have ppl in my life that do this bullshit. As soon as the girl his gone he will call like 5000% more and text 5000% more.
ここには何もないようです