That crush for a straight friend

So here I am again, after more then five years of obsessive crush for a straight friend, into another one again. I was so happy when I got over the first one... Now I have come to that point of desperation. It's harder than before now. We kissed three times. But it's nothing to him. I am beginning to become obsessed again.I must say, that's certainly one of the biggest cons of being gay. But I guess I'll get over him sometime soon as I did with the other one. It's just a matter of time till I'm over him and into another straight friend again.How to stop that?