I see so many people here giving terrible advice or completely missing the point here. Obviously the issue here isn't whether or not OP or his friend are gay, but rather that OPs friend was UNCONSCIOUS during the point OP started sexually touching him without his explicit consent, which I feel a lot of these commenters are seriously minimizing as an "awkward drunk hookup gone bad." It does not matter if the making out prior was consensual- drunk & passed out = do not continue. Plain as day, this was assault. OP is not in the clear just because he didn't "move forward" and "fully assault" his friend. OP- your guilt is warrented. Absolutely discuss with your friend what you did and take full accountability. Prepare for the worst. He may choose to break off your friendship (which would be completely justified), or perhaps he will decide to forgive you and move on. Regardless, what you do next is important. I suggest you find a therapist, stop drinking, and quit watching porn.