Friendship is more important than lust, its worth remembering that.
Last year I started Uni and early on I told one of my friends I was gay. Eventually I also let him know that I was attracted to him, but he is totally straight. He is fine about me, but doesn't like to talk about it. As the year went on I became more obsessed with this guy and would masturbate two or more times a day thinking about him.
On one occasion I saw him first thing in the morning in just his boxers with clear morning wood. I came in my pants right there on the spot and had to go and clean up!
It all came to a head when we were watching a film late one night. We had blankets on and were falling asleep as we watched. Well he was. Once I thought he was asleep I looked at his gorgeous face and I was hard straight away. I took out my cock and began wanking, cautiously at first, but as I was gripped by pleasure I got faster. Then I felt a tremendous orgasm, one of the best I have ever had. It was hard not to shout out, but I didn't want to wake him and I writhed on the seat. I used my underwear to catch the waves of semen and they were absolutely full. After this pleasuring I was overcome with guilt and ran to my room in tears.
At the end of the year we stayed at another friends house. I couldn't wank, so was feeling frustrated. One night this guy and I were in sleeping bags on the floor together. I fell asleep and for the first time in my life I had a wet dream. It was so vivid but I didn't want to remember it, as in the dream I raped my friend. I was so confused and I even told him. He was a bit concerned, but didn't seem too worried, particularly when I said I would never do it in real life. The guilt was overwhelming and I cried myself to sleep that night.
Over the summer I decided I needed to get a grip, because I didn't want to loose the friendship or my sanity. Now in the second year I still think he is hot, but the obsession is gone. Only occasionally do I get a boner when I see him topless, etc and I rarely think about him when masturbating. Last night however, he caught me looking at gay porn, which he found disgusting. Before I apologised, I beat myself off imagining we were mutually masturbating, like some of the people in the stories on this site!