My now Ex boyfriend and I broke up around a month ago. He keeps trying to negotiate and beg me to take him back. Whenever I say no he goes into a mental breakdown and leave me alone. He also starts to guilt trip me saying I did this to him and he’ll never forgive, yet He ask me and comes up with new deals every week. I do not want to date him again but he won’t understand how bad our relationship was! How can I tell him I don’t want to be with him but not have him lash out verbally at me, again?