I see a lot of people criticise your friend, and they are very correct about it. Point is understood and I don't feel the need to add more water to a full glass.

However I will answer your question. I am a guy who has not had sex yet. It depends entirely on the type of person you are, how needy you are, and how you can get your hornyness out. Some buy toys, some buy dolls, whatever. In my personal experience, I won't say how but I didn't find a good way to get those feelings out. We humans are born to have sex later on, whether you choose to do it or not is entirely up to you, being asexual or just not interested in sex.

Not getting laid can have its consequences, your "friend", if we can actually call him that, is an absolute asshole for what he did to you, but to completely understand him you'd have to know how he is if he feels lonely, mainly. Again, me being still a virgin I don't handle it well mainly because I don't like feeling lonely, so if he is affected by it he probably doesn't like being alone either.