I'm addicted to my white girlfriend
What do you mean, "addicted" to your girlfriend?
I need to have sex with her almost every hour. I'm not interested in other girls anymore.
That's cool you have someone you're so attracted to, but what you described sounds a bit excessive. It's good to have time apart, and you shouldn't base a relationship solely on race or sex.
I know but my heart just goes boom and there is nothing I can do about it. I have to have her.
You are bordering on being obsessive in wanting to be with your girl all the time and that is unhealthy. You need to create a distance between you two before the situation gets you into real trouble.