Do not respond at all. You have several questions about this terrible breakup, and I know it is wearing you down considerably, but you must accept that you two must go separate ways. Stop all communication from him and do not contact him. Go about your life and spend lots of time with family and friends who love you no matter what.
Dump him and move on. You don't want someone that doesn't love and respect you. And don't make the mistake of thinking that he will change his mind and magically fall in love with you. If he doesn't love you by now he never will; sorry but that is a cold fact.