Please keep off the IM today. You need to let him feel a little of the consequences of his actions. Each time you reply you pacify him. Wait until your call tonight. I really strongly recommend no contact today. If you must contact just say 'thank you, I have read the email I want to think about it' or something like that. Remember what the book says about not being over responsive if they do reach out. He asks you for space constantly now let him give you some.