One day he wants me the next he doesn't. From a guy's point of view, what's going on in his head?

This guy I've known for 15 years since we were 17...we had sex back then and are having sex now. I am having an affair with him. I live with the father of my one year old daughter. The guy I'm having an affair with said last week "I want you here with me, I promise I will make it worth your wild".... Show More