Your boyfriends insecurity, jealousy, and anger and to be part of a pattern that often gets worse without professional help. The frantic texting and jealousy typically evolve into more controlling behavior. I would stand my ground if I were you. Be very clear about your boundaries. He will no doubt be angry, but at least you won’t lose yourself in the relationship.
I recommend you contact the local woman’s center in your county. They often have counselors who can speak with you individually about what you’re going through with your boyfriend.
As far as your boyfriend is concerned let him know his behavior is unacceptable. Couple counseling would be good, but in the long run your boyfriend is likely to need some therapy understand the root of his jealous and controlling behavior. Regardless of what the diagnosis is for him, BPD or otherwise, you want to be very clear that you will not accept his behavior.