It sucks, but you're going to lose your license. Also, there's no way you were that ****ed up to blow a .63. That's impossible. ANYTHING over .5 will kill you, maybe even less than that.
In that case, if you mean .063, you're under the legal limit (if you're 21, which you aren't), and with a lawyer you may be able to reduce your punishment. You'll no doubt get a hefty fine and a suspension, plus maybe something for underage consumption. Either way it won't be fun. The bottom line that if you're going to drink underage AT ALL (bad idea nowadays, it seems), stay the hell out of a car.
Also, you've got enough people telling you how huge of a moron you are, so I'll forgo that.
Good luck, because to be honest, at the end of the day it seems like you weren't exactly hammered. You just got unlucky in a situation I'm sure a lot of us have put ourselves in. Doesn't make it right, however.