Bowhut72 brings up a good point, are your feeling reciprocated, if they aren’t you are setting yourself for heartache in any relationship (regardless of the genders involved).

Personally I don’t see how I could ever have “those” sorts of feelings about another man but if I did find myself in that situation I would hope that I wouldn’t just shut the door what could be a great relationship. But I would also hope that I would realize that this is a big lifestyle change, and has implications in all aspects of a person’s life, so don’t ignore your feelings but don’t let them run your life either.

Whatever you do, think it over first. And if the other person won’t/can’t reciprocate your feelings then move on quickly and quietly.