She sounds to me like she is getting anxious about the relationship's becoming more serious and wants to make sure that everything is secure and well organized. Unfortunately, it sounds like she is becoming controlling towards you.
You own your own business and sound like you're happy doing it. Perhaps she does not like the risk that goes along with running one's own business and would like to see you in something that, in her view, is more stable and secure. Unfortunately, that does not mesh well with who you are.
I think it's time to end the relationship. Find someone who accepts and appreciates you for who you are rather than someone who wants to mold you into her version of a "better you."