Let me say I'm sorry in advance because this is going to be a long post and sounds like a story that should be in the Fiction/Story section. This is my true story.
I had a situations just like this years ago. One night while me and a friend were drinking, I told my him I thought I might be gay because I thought about what it would be like to blow another guy. He said he was really hard and that I could find out right now. He dropped his pants, laid back and just smiled. This was my chance, so took his hard dick in my mouth and started to suck away. This was just a purely a sexual thing for me. I wasn't "in love" with him or looking for an emotional connection. After a few minutes he started to moan. A few minutes later he whipers "oh, man you are really good at this." A few minutes more he acts like he's about to cum, then all of a suddent he yells, "Hey, what the fuck are you doing?" He was so drunk he must have passed out. Apparently I was so skilled at sucking that I sucked him back to conscienceness and sober! He jumps up and starts yelling about how I had taken advantage of him and how I had violated him. I said "Well, I'm not the one who dropped his pants and had a hardon." He ask me to drive him home so I did. The entire drive home was silent. When he got out of the car he said our friendship was over and he never wanted to speak to me again.
Several months pass without any contact. Then out of the blue one afternoon he shows up on my door step. He said he had thought it over and was willing to forgive me. He valued our friendship and wanted to go on as though nothing had happened. He was ok with the fact I was gay and as long as didn't hit on him we'd be fine. I agreed and went on just like before. That evening we made the usual rounds and hung out with old friends. As the evening worn on he started making little comments in front of people like he was trying to humiliate me or "out me." Kinda pissed me off, but didn't surprize me. He always had been a dick I figured he was trying to give me a little pay back.
As the eveing wore down we were alone again and drunk agian, as usual. He starts talking about how horny he was and about what had happened the last time we were together and how he had not enjoyed it. I said I was confussed. If he did not enjoy it then why was his dick so hard before I touched him and why did it stay hard while in my mouth. He said, "I'm always hard, just like now." I knew where this was going. He starts rubbing his cock through his pants and says, "Man, if I don't shoot a load soon I thinks my nuts are going to exploded." A few minutes of silence pass. He askes, "Have you sucked anyone else since me?" I reply, "No." He askes, "Do you still think about it? Do you still want to suck another cock." I reply, "Yes. Why? Are you offering?" He pulls his pants and boxers down to his ankles and turns his head way. I take the bait and reach over and start jacking him. I ask him if he likes this. He said, "Not as much as what you did last time." I lean over and start to blow him. After a few minutes I can tell that he is really enjoying this (as am I). Then just as think he is about to cum, "Hey man what the fuck are you doing?" "Just what you wanted, you asshole!" I replied. He starts playing the poor little victim routine again. Yadda, yadda, yadda.
Well, this little game when on for about a year. The first ime he stayed away a few months. The next time a few weeks less. The next time one week and so on. I figured he was having trouble coming to terms with his sexuality, experimenting, or just taking advantage of a situation. If this was the game he needed to play, I wasn't going to push the point. I knew he was not being forced or taken advatage of, and I was getting what I wanted and needed out of it.
For what it is worth, this my give you some insight about your friend. He may be conflicted and confussed and afraid. He may be in denial. He may enjoy playing "the game." He may be angery at you beacause you represent a thing he is having trouble with. All you can do is be as honest with him as you can be and give him time and space. With my friend there was no love/emotion so it was not too difficult to deal with. Yes we were friends, but it was kinda like a love hate thing. Did I mention he was a real dick? Just be true to yourself and don't let this drag you down. Present you case, then the ball is in his court.
Good Luck