:( sorry to hear that, at the end of the day if she just wanted the sex, then in my opion shes wasnt worth it, I kno sex sometimes plays a huge part in a relationship, but if u wanted something seroius and she just wanted sex, well tbh your better off without her.
At the moment your probly thinking your not better off without her, but if it was purely about the sex for her. And nothingl ong term (which I think u wanted?)
well as I said, you'll realise that it was maybe for the best. Now get out there and find a new girl. Its very hard , I know :o but apprently girls want a guy more than we want them, personally I dont think that thats possible, but chin up mate
(i hope everything I said made sense :s)