...I really don't think so. Lots of gay guys act like that with their friends. I really doubt it means anything.
It's not really comparable to a male/female relationship, because society has much more deeply engrained ideas about what is appropriate vs inappropriate in a male/female platonic relationship. So many people consider it disrespectful to spend any one on one time with anyone of the opposite sex if you're in a relationship - look at the way people went nuts about Rose and Gio going out to dinner for her birthday until it was revealed that her boyfriend was there too. Hell, lots of people even still have the attitude that men and women can't be friends at all. And in straight relationships it's uncommon to remain friends with an ex (just google 'is it ok to invite my ex to my wedding?' and see most of the responses are emphatically negative.) That's not really a thing for gays, and especially lesbians, unless it's a bad breakup, because the circle's just too small, you'd run out of friends that can hang out together if everyone wanted to avoid their exes.