Was I overreacting?

My boyfriend's friends were trying to get him to say f***ot and so he said it once. I told him how it actually made me feel being as I'm not straight. Even though I'm not a guy, it still bothers me because I don't think it really just applies to gay guys anymore. Anyways I've told him not to say it before, but didn't give a reason. Later on, his friends were trying to do it again and I told the main culprit that if he didn't stop saying it, I'd kick him in the balls until he realizes how it effects people. I got so mad that I was shaking and I just don't know if I should have really said that. I'm still shaking because I'm still extremely pissed