A woman.
If a woman leaves me for a black man it would be because she's been brainwashed into believing black men are better. And maybe the specific black man she leaves me for is. And that sucks and women are whores and it's ridiculous white men collectively are cucked enough to allow this to happen, but at least it's not really my fault.
Whereas if she leaves me for a woman it would have to be because I'm a massive faggot.