Physical & Emotional Abuse Support Group
Abuse is a general term for the treatment of someone that causes some kind of harm (to the abused person, to the abusers themselves, or to someone else) that is unlawful or wrongful. No one deserves abuse, period. Abuse can be emotional, physical, or sexual.
I would say your boyfriend's threats to leave are probably just another control tactic but please realise that someone who loves you doesnt do these things to hurt you. I totally get the fear of the unknown and being alone, I thought about leaving several times when the abuse was really bad and now wish I had. Your life is slipping away THE ABUSE WILL GET WORSE, NOTHING YOU DO OR DONT DO WILL MAKE THINGS BETTER and let me tell you that what is out there is almost certainly better than what you have now.
Good luck and if you want to talk I'm here x