I'm in love with a woman that isn't my wife.
Do you really think you love her enough to leave your wife?
I do. I can't stop thinking about her.
It's sad for your wife that you feel that way but you should at least end your marriage before you pursue anything with this other woman. At least do that much for your wife since you're set on leaving her.
Fuck this, I don't care about my wife.
What you are doing to your wife is hard enough. At least give her enough respect to end things before pursuing a relationship with this other woman. You owe your soon-to-be ex-wife that much.