Your gay friend is inadvertently telling you something. Not all gay folk are promiscuous. Many of those who are or were, mature out of it. Some never do. Much like straight people.
Just so you know. A lot of gay people don't like bisexual people.
I tend to think my friend is telling me he is alive today because he wasn't a freakin' man-ho. He's my friend. I've only known a few homosexuals that I call friend because they NEVER "hit" on me. They NEVER tried to convince me that I should "try" being homosexual. Why? Because they are my friends.
I knew more than a few homosexual men in the 70s and 80s and the majority of them are dead because prior to AIDS, they just got some antibiotics to take care of the "clap" and then immediately went back to being really promiscuous.
From what I've been told, some homosexuals don't "like" "bisexual" people because they are homosexual and they don't want to "share" with the opposite sex. Lesbians are very disgusted by a woman that would also have sex with a man. Dykes are disgustingly jealous of one another and more so of men that "steal" a "bisexual" woman from them. FTN. Male homosexuals used to laugh their ass off about "fruit flies" that frequented gay bars. As AIDS became more and more prevalent, this became less so, or at least for a while.
So again, my friend was not being inadvertent at all. He is still my friend and thankfully, still alive.