I'm going to completely go off on my roommate
What did your roommate do wrong to you?
He keeps on disagreeing with me ever since I moved in.
I'm sorry your roommate is very negative with you, but you shouldn't have bottled up all these feelings until they will finally blow like this. You need to calm down, take a breather, and just find a good opportunity to sit down and talk with him calmly instead of making him hate you.
Maybe I should've gone to therapy, I'm fine now.
I'm glad you're feeling a lot more calm now! I'm sure you can try to patch things up with your roommate, and they would appreciate you doing it in a calm manner instead of being negative about it.