Hey there, gosh i tort i was the only one with that problem. But its been two years since i broke up with my ex and i still see his friends around and yes, they do mention him but i dunno if they r doing it "purposely" or just "unintentionally". I had this prob like a year and a half ago, thinking, "hang on, am i still friends with them? Shud i b friends with them?" Gosh i was soooo confused!
But ANYWAYS, no matter what, they still remind me of him. I mean, i guess they are also in a position thinking the same. Its really a choice, if you wanna be friends with the ex's friends then u can, but you wont really get anywhere. Sooner or later you probably grow apart from them. And if you choose not 2 be with them, then i guess they will probably understand.
From personal experience, I wouldnt really be close to the ex's friends, an occasional hi, hows it going is fine. But besides, its just eventually become like this anyways, ive just grown apart from them. I just get annoyed when they mention his name coz the least i know about him, the better!!