Grow up bhai. 25 years from now on, you don't wanna know what your 19 year old daughter will be doing. Let them do their thing. Its their life. Why does it bother you that much? Sure, if you come across a s****, don't fall for her and watch who she's been with but I'd strongly urge you to keep your virginity intact for the right girl buddy.  You'll definitely come across some decent guy or a girl who will take care of you. This isn't a proper way of pouring your frustrations though. Its evident that some hot Nepali ladies rejected you but surely, you've got better things to do.