GPS tracked my boyfriend somewhere he says he wasnt?

He's a liar. Call of the engagement. You're story doesn't sound like you're shocked at all. You know what's going on and you're sure of it. The only thing left I'm sure is for you to be upset when you find actual proof. Don't wait for that. You know what's going on and from your story, I know what's going on. He's cheating. You know what needs to be done.