>>33455136 (OP)
Your first mistake was forgiving her. All you did was tell her "hey, you have permission to do it again because you get to experience zero repercussions!"
>She loves me.
She does not. Love would preclude cheating. She's afraid of what life without you will be like because she can't get a man to do anything more than fill her holes. Commitment is out of the question.
>She cries when I bring it up.
Girls have learned from a very young age that crying tends to lead that big burly man (daddy) to do whatever they want, eventually. Means nothing.
>Her mother is manipulative.
All women are manipulative to an extent. This isn't meant to cast them as bad: it's just a result of biology and not being able to depend on physical strength to solve their problems like men do. The only thing that matters is whether or not you're aware of it and acting accordingly.
>I thought about just getting in my car and driving elsewhere.
Eh, you don't want loose ends hanging over your head for the rest of your life.
>She acts retarded and I know she’s smarter.
Manipulation. See, she loves you so much anon! /s
>I don’t want to be with her anymore.
Good. Finally.
>What the fuck do I do?
Consult a lawyer and come up with a game plan so you experience minimal blowback from a divorce. Might even be good to get a pro men female lawyer because they know how manipulative bitches can be, but just go with whoever fits your needs best. The courts were built to rape men of their work and finance, even if the bitch is the one that cheated or fucked things up. How bad it is depends on the state you're in, though.