They always know what to say...they are master manipulators.

Don't beat yourself up. Let go of this guy. Kick him to the curb.

He is not a good person. He is a user and a player.

Decide what your standards are for friendship. Are they low or high standards? What behaviors are you willing to put up with from people? What behaviors cross your line and are cause to be cut loose from your circle of friends?

This guy is a chronic plan-canceler. He's what I call, an option-izer. These people have a vast social network and will cast a wide net of plans with multiple people and then decide at the last minute, which friend they feel like hanging out with. The friends who get canceled on, or no-showed on? Well, the option-izer could care less about their feelings.

This guy is not worth your time. Stop letting him talk his way back into your life.

You deserve better treatment and this guy is not capable of that. He's proven that to you time and time again. But you have to call "when" and put your foot down or he'll keep manipulating you because he know's that he can. He doesn't respect you or he wouldn't treat you with such disdain.