If you look at life like that, you'll never, ever get anywhere. It's not a matter of finding "the one." I've fallen in love before, and for one reason or another, it's never worked out. I fall in love with unavailable girls, gay girls, girls who live far away from me, girls with boyfriends; I've had one real relationship, which was lovely until we grew apart. All this has given me one tip: take things lightly. Have fun. So what if she's a raging lesbian? So what if she lives halfway across the country? So what if there isn't anyone at all? Laugh at yourself, make fun of yourself for your constant singleness. Laugh at yourself for being so fucked up that you can never fall for anyone you can have. Have fun with life, and stop taking things so seriously. Because that's a fuck of a lot better than wallowing in self-pity.
And then, maybe, just maybe, if you treat the world like a brighter place, relax, and stop expecting every girl to be the one... Maybe, she'll walk into your life one day, and you'll be happy. I still hope for that.