Would a bob look good on me?

You're a doll! You have such beautiful hair too! Not sure about the actual bob, but maybe a graduated bob? Otherwise just get a trim to clean it up a little...I had long, layered hair like you too and chopped alot of it off last year with a graduated bob AND fried it with at-home highlights and a perm that just doesn't want to leave even though it's starting to look like crap, and I envy that beautiful long hair! You're best bet is to ask a hairstylist, they'll be able to help you a bit more.