I have met mny Nepalese married to  European or American women and living happily with love and kids. It all depends upon confidence to each other without any self-interest. Love is love - it does not matter much about culture, religion and language. So it depends on you how you adjust yourself. However it is true that it is better and comfortable if you marry within the same religion and culture and this is the reason that Nepalese parents here wish their children to marry in Nepal not here as far as possible.

Although love is blind, it is better to try inside our own culdture and religion.