Rejection really hurts......anyone had a major rejection and?

Best coping method I have found is to forgive. She sounds like she likes you as a friend, if you feel up to it I highly recommend staying friends with her. Tell her you respect her relationship and that you'd still like to be friends. Take a look around, you're young, that there's plenty of cute girls with good character out there. It'll sting for a bit, but eventually it'll go away. And you'll be able to breathe freely again. Hang in there, your life has just begun, there's plenty of adventure to find. Be safe though, ok?