My teeth are horrible and my dentist hasnt aked me if i want braces!?

i HATE HATE HATE HATE HATE my teeth. they are wonky and horible and i have loads of gaps and crammed teeth at the bottem, my dentist hasn't asked me if i want braces, but i really want them, i know they will look horrible and hurt alot but my teeth are so discusting! i have to sort it out! what should i do?