Well I'm comfortable enough with my sexuality to play it even if he is gay. Besides, it might be interesting to see an unrequited love between the two main characters.
I personally think that Nomura may or may not have intended him to be gay, but to be honest, I don't think SE is brave enough to push the boundaries that far. At least not yet.
And you all say you are not Homophobes, but most of you do seem it.