Cinders, I would take what he says with a grain of salt. He may or may not be going to an event with those friends. Also, he saying he has food at home to eat and can't stay for pizza....may or may not be the ow pushing and pulling his strings. He may be going through a period of "shock at himself", i.e., he found out that he liked your company, liked the family unit as a whole and scared himself silly into running back to the ow. I've seen a lot of them do this and use very poor excuses, just like the one about the food, to keep their distance.
Please do not allow his comments to get to you. It's tough, but I really wouldn't give his comments much thought these days. He's just digging at you to make you feel left out and him trying to show you that he's moved on.
Enjoy your dinner with your friends.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
