I'm like you. I'm also waiting until marriage :). What I would do is I would use humor. Show him funny video clips stuff like Whitest Kids You Know. Oh do something else play CoD for a few hours, go to a concert, go outside, wrestle, PAINT BALL (the best thing ever). Anyway just try to show him that if she really liked him she would've accepted his decision. True love waits.

Sheesh, she dumped him for that? then one thing is for sure, he's not missing out on anything by not being with her.

Yeah, really. If she really liked him, she would have waited. Relationships aren't based on sex, and shouldn't be. Do as Quitethejoke said, and do stuff with him. All he really needs is time.

well first of all, congratz on waiting until you are married to have sex, im a christain too but im not sure that i would be strong enough to do this, most guys do not show this level of commitment to their religious vows sooo i applaud you both for this!!!
as for your friend, he is much better without her if she could not accept him and his beliefs, that is a very selfish and immature thing to do, and sex should be mutual in a relationship, if he didnt consent to it she shouldnt have pressured him!!
my best friend went through a rough break up a while back and what i used to help get him through it was, support, humour, and activities!! keep him occupied, maybe if he has a talent encourage him to pursue it!! it helps express how you feel and ease the hurt!! sport also is a good way to ease the hurt and he will feel better after exercising and will have more energy!! he will get over her in time, all you can do is be his friend which is what he needs right now!!!!
best of luck!!!

I guess what she is feeling is not love after all. If she loves your friend, she would understand and respect his decision...