I'm a nerdy girl who doesn't like nerdy guys...am I doomed to a life alone?

When a person faces this type of problem (ie. they can't seem to attract the type of partner whom they find attractive), the first question they have to ask is "am I the type of person that this type of guy/girl would be interested in?" If you're not, then you have the answer to your question. Then you can either learn to live with it and settle for one of the nerds who are in your league, or you can make some changes to your appearance that will make you more appealing to the types of guys you want to be with.