I don't know if this will help at all... I've some great male friends throughout my life, and many of them I was very attracted to, but I"m terrible at making the first move without encouragement, so never did anything with most of them.
One of my friends, Russ, later told me that he really had wanted something between, but I never had a clue! If he'd made any indication, I would've been willing but never had the chance.
I think it's difficult for guys because the girl expects you to be the one to take charge and if you aren't that type, it's easy to feel frustrated.
Nice Guy, remember especially when other things in life are stressing you out, just try to take it a day at a time. THings will get better!
If you need to pm, feel free !

Oh and I think that it's wrong to say 'nice guys' = defectives. I've known nice guys that were soooo damn sexyyyyy (and still had trouble getting girls cuz they were too shy I guess)! I've known nasty mean guys that were ugly as sin. It's just a personality thing.