Thanks for the replies everyone.

To be honest, I don't think I was totally clean in this fight.

It started when I asked him a question on facebook. (The fight was completely online.) He responded with a "....". I got SUPER annoyed because he responds like that all the time, and it seems like he only does that to me. So I started venting. I started saying that I hate him, I hate everyone, I hate my other friends, etc etc.

Then he told me that he doesn't give a damn whether or not I hate him. That's when the fight really started.

I do have a therapist and a psychiatrist to talk to. I will talk to my therapist next week, and my psychiatrist next month.