KGirl, hold on. You are being extremely strong and I honestly think you are not going to understand anything. Everything is contradictory and confusing, because he is confused. There would be no point trying to understand him right now because it sounds like he doesn't understand himself. Despite what he says about being "99% sure" my guess is he is not even close. He sounds just like mine.. trying to convince himself more than anyone.
Try and be as strong as possible during this transition period, but also try and do all the techniques you read about here: act happy, act "as if," act like you are moving onwards and upwards, especially in the time surrounding your mood. You just might find this is what makes the difference.