What you wrote doesn't sound like your fault. You planed to stop by (not impulsive). Didn't feel you had to tell anyone since you were out, it was late anyway. Friend flipped **** and assaulted you. Then your aunt did the same. You finally struck back after x years and said stuff you regret. Her reaction caused her to be hospitalized. Your boyfriend is probably angry because you got hurt and it scared him.

We're here for you but I really think you need a therapist because you're environment SUCKS and you need help separating your issues from others issues. The only thing that you did "wrong" was hit back. Your letting friend's and family abuse you and that's not okay for you or for your son to see.