I used to be friends with this guy, and we always either mutually masturbated, masturbated each other, or wrestled in our boxers or nude.

Then one night when I was sleeping over at his house and we were lying in bed together, he asked me to give him oral sex. I told him no, even though I really wanted to try it. He never talked to me again. What should I do, and what does that say about him?
- age 16, Illinois

It sounds like he wasn't quite ready for the events that developed in your friendship. It's probably too late now, but you possibly could have saved your friendship if you had just explained at the time that masturbation was as far as you wanted to take your experimentation together. He probably felt ashamed that he had asked, and maybe he felt your opinion of him would be different from then on. He was probably already ashamed about some of the things you had done together. But frankly, anytime a friendship escalates to this level, things can derail pretty quickly. Both people involved need to be thoroughly comfortable with themselves and what they're doing, and if a conflict arises, they need to be able to talk about it.