Exactly.
I personally think he's bisexual because he is genuinely interested in Kelsi, but there's something about the way he acts around guys that convinces me that he's interested in them as well. It's not even the flamboyance (I think Sharpay's influence had a lot to do with that), but it's just the way he acts, the little subtleties. But then again, I don't expect them to pair him up with say, Chad. As homophobic as it may sound, it may be too risque for Disney (from the point of view of Disney execs, I mean).