Hmm so I guess there are at least 2 problems due to your culture difference:

1. Between you and her and how you want to raise your kids

2. Betwen her and her family, puttting you in a very tough spot. It is very weird for me to see some cultures reject other cultures so hardly just because they are from a different counrty but you made it pretty clear tht your parents won't accept her...

Even if I were your best friend and knew everything about the situation, I don't feel like I would allow myself to tell you what to do... I can only empathise, and wish you the best.