VCard Tips

Emma
So, I'm 16-almost-17 and I tried to have sex with my boyfriend (same age) a couple of days ago. We are moving pretty damn fast, and kind of jumped from making out and humping to penetrative sex, and probably should have hit some more steps in the road there, but we're comfortable with it, so that's better. 
But when we tried to have sex (emphasis on tried) it hurt so fucking badly and we just gave up, and I think it's because I wasn't aroused enough to be wet enough, and we also didn't stretch my vagina. Does anyone have any tips on making sex easier and more enjoyable? Because I'm pretty damn sure I'm not ace, and there must be a reason why people do this. Thanks chicas!