Keeping calm in a certain situation.

Relationship of 2 years. we decided to take things further. Last December, we were forced by the situation to tell our respective families about our relationship. Both families reacted very badly mainly because of intercaste issue. Her family has certain presumptions about how people from our caste are and they are convinced that she will go through a lot of trouble if all this happens. Pros: 1. Me and my girlfriend we love each other 2. My family (grooms side) is not opposing this anymore (not proactive either) and family is okay with certain conditions put forth by girl initially. Problems: 1. Girl's family is not ready still. Though they have  shown some positivity at times. Main concerns are based on assumptions like guy's family will cause a lot trouble later for the girl and themselves. 2. Girl's family is rich. Guy's family is typical middle class. 3. I am getting insecure. 4.her family making her choose between me and them. 5. she has told many times, she can't leave family.