Should I forgive him?

So me and my friend Carlos who I call my brother got in to a BIG fight because of his gf. She called me an a$$hole and I got PISSED. So when I told him he said he didn't believe me. Like WTF! So later that day during 3rd block I wrote him a LONG letter and I gave it too him and he got all pissed because I said some REALLY mean stuff and was yelling at me. So he had his friend try to fight me, but she wouldn't because shes a pussy. I didn't intend to hurt him, but I was pissed. So yesterday after 3 weeks of not talking, He told me before going to homeroom he was sorry and asked if I was still mad, I said kinda and he asked if he can have a hug, I just gave him a weird look hugged him quick and walked too homeroom. And today he stuck up for me because this kid was trying to fight my friend and I was holding the other kid back and he kept hitting me and Carlos got pissed. So I was wondering should I forgive him? Because he said some REALLY hurtful things back. I've been thinking about just sending him a message and tell him I forgive him but we can't be friends..should I?