I don't think you should break up with your boyfriend.
Talk to him about how his parents are bothering you. He may have some good ideas. Also, I think maybe you could try being a little fake around them? Like maybe just pretend to follow their ideals or whatever, if that would help.
I guess if it comes to that, you'd have to break up with your bf, since things aren't looking good.
Stay strong. Things will get better.
PM me if you ever want to rant