Another thought to consider: how do you feel about your personal body image? Could it be that, deep down, the reason you are interested in seeing your good looking friend naked is because you are subconsciously comparing him to you? It sounds to me that you really look up to this guy like an idol figure and get a bit jealous or defensive if others get in the way of your friendship with him. What I'm saying is that potentially, you are just idolizing him, and not actually gay. You're the best judge of that. If it turns out you're gay, then it's nothing to be ashamed of. It's who you are and you should be proud of it. It won't be easy to come out, but take your time, and confide in a close friend first. Good luck!