Will I ever hit puberty?

I turned 17 a few days ago, and I've been waiting in agony for 3 years for puberty. My voice hasn't changed since I was 12, so I always grunt to try and pretend it has broken, which fails, I have no pubic hair anywhere, my penis is 1 1/2 or 2 inches when flaccid, and I still have tiny balls which won't sag, and my face is completely smooth. Until I was 15 it wasn't a massive problem, because 6 or 7 other guys in my year still had high voices and hadn't hit puberty, but they all have now and only I'm left. I'm so depressed about it, because other guys at school always imitate my high voice when I speak (it's a really rough school where there arent many nice people), some of them call me 'pinny boy' and some of the girls make fun of me as well which is even worse. Also, in swimming lessons, all the other guys have bulges in their trunks, and I have a tiny little bulge just visible, and a couple of the girls sometimes check it out and it's excrutiatingly embarrassing that there's nothing there. Also there's a compulsory shower beforehand to get rid of any dirt so it doesn't get in the pool, and feel like I'll collapse in nervousness that someone will see it in the shower room and while I'm changing because it shrinks to 1 inch in cold water. I've gotten so annoyed that I've started pulling really hard on my genitals to try and make them bigger, but it aches and it hasnt done anything. Please tell me I will start maturing soon, I'm sick of being stuck at 12 when all the other guys are pretty much men. Thanks.