If you can learn to love your crooked teeth you might not need as much work done on them as you thought.
I needed braces too when I was around twelve, but I never got them. My entire bottom row of front teeth overlap each other at the edges, my two front teeth on the top (crowns by the way) Stick out really far downwards, giving me an overbite, and my canines push forward like a dog's. Regardless, I love my smile with all it's quirks and twists. Heck, crooked teeth are actually considered attractive in Japan, they have cosmetic procedures for making them crooked and everything!
I'm sure your crooked teeth are just fine the way they are. Just think about it, we have smiles like Japanese pop stars!
(FYI, my words are not to be taken too seriously. If you really have problems with your teeth, go ahead and get them fixed. Just keep in mind that straight teeth aren't always the most beautiful teeth. Take care!)