What should I do? Forgive him or not.?

So I got into a fight with my ex. He got mad at me over the stupidest reason & then accused me of Breaking up with him for his best friend. I don't like his best friend in that way. He doesn't understand that though, so he said some pretty mean stuff. It really hurt and now I hate him sortof. He keeps trying to talk to me though and I don't know if I should forgive him or not... Should I?