A few weeks ago, I met a guy, and we started a friendship. We're still getting to know each other, but as time passes I have more and more reasons to believe he has different interests than I (a heterosexual guy) do, though we met in person only twice, and he never told this explicitly.
To be clear: I like him as a person, I'd have absolutely zero problem with it if he is LGBT, and I already made light, indirect hints to this. Still, it'd be good to know if that's indeed the case for sure - hell, I myself act jokingly as if I am gay rarely with close friends - though I've never done this around this friend yet and he hasn't met the friends.
I don't want to treat him differently. But if he's homosexual, and he didn't "come out" to me yet, there are topics to avoid, like relationships... (he's not in one).
Of course, I could just ask "hey, I'm not sure about your sexuality, are you gay?", but I'm afraid of him finding this offensive/uncomfortable if he isn't; and if he is, this leaves no room if he doesn't want to tell.
How, if, could I ask him make him explicitly say if he's homosexual, without risking our new friendship? Should I even ask him at all? Are there any alternative ways of finding an answer?
(Update a few years later: I never asked (as per answers), but he was definetly LGBT. In retrospect he obviously behaved somewhat flirtatiously with me, and I should've realized. Actually, the real question I should've asked is how to make it clear I'm not open to same-gender relationships without being awkward in case I was wrong about his sexuality. But the answers address this as well to some extent.)