How should I tell her I want to quit?

My girlfriend is a Thai and her family is very religious. It is impressive though, but I did not expect them to be that religious. It is a good thing, of course. The problem is that my girlfriend and her family is slowly changing me. A foreign culture is making me difficult to fit in. I donít like it that way. My girlfriend doesn't want me to spend time with my friends because according to her, my friends are all bad influence for me. She just wants me to spend time with her alone. She and her family donít want me to go clubbing. Itís really annoying. They are choking me, really. I canít be with those kind of people. Is it rude if I tell her I want to quit because of that?