The reason that you will have no luck with her is that you are suffering from a temporary form of INSANITY. It is the type of romantic love that is closely linked to OCD.

With this "Prom" coming up you sound like you are in the US. There is no such hype about such a thing in my Country.

My advice would be to accept that you are not thinking in a way that a sane person does, and that it is temporary. There are ways in which you can very easily get over such a female with basic cognitive therapy techniques. You would have to read into them yourself. Because you are feeling suicidal, I would very seriously consider medication. As I say, you can find studies linking OCD with this type of experience and OCD can (and will in your case) go hand in hand with depression. SSRI treatment can help both. When you are in a situation like this, it is best to use the drug and therapy to deal with the underlying problems. These are issues for you to look into and obviously to discuss with a physician. I do not like to label things lightly, but this sounds like a nasty problem for you.

A good old-fashioned technique is simply to be around other women. Sleep with other women.

All you have to do is get a bit of game, and you are fixed.

But as I say, you are in another world right now. Realize this, because when you come out of it, you will not be able to remember why on earth you were so obsessed with this girl.

Take care.