Should I be friends with my ex? Listener question

My fiancée broke up with me last month because he felt he was too young to settle down. I was and still am devastated. I think of him all the time and would do anything to get back with him. At the same time I hate him for what he has done to me. 

He is very clear that we won’t get back together but he wants us to be friends. He says if I really loved him I would still want to see and speak and spend time with him. I can’t imagine just being friends with him and especially not being out in a bar with him when he is with someone else say. I wanted him to be my husband. Should I be friends with him? Or should I cut him out of my life?