Hey Neo,
You can try these:
1) To fall out of love: think of all the bad things about her eg does she pick her nose, she smells, etc. all the dirty nitty gritty you can find or know about her, perhaps this will give you a second opinion.
2) You can be the noble man, really endure that painful feeling of knowing you can't have her, and just hold on, wait till something bad happens to their relationship, be there for her, etc... and just keep on holding, praying that your perseverance will pay off
3) You can fight for your love and tell her! Do not care about your friend, say your love is real and she is worth fighting for. Try and if you failed, at least you tried.
4) But really i think, you haven't been out much. When you go out to see the wider world, you'll find that there are a lot of wonderful and beautiful girls out there. There's a very good chance that one of this girls will really love you. Try talking to at least one of these girls out there and your perspective will widen. In the meantime, do your best to be desirable.