Hello Hydrogen jee,
cool bro, kina budheskal hune ni , sabaivanda pahile be cheerful all the time (wrinkle free cream launu na )if you have wrinkle. Cheerful makes you younger, try to be polite to all girls, ask her how is she and her family if she has in Nepal or here ( I love caring guy). give her compliments or say thanks to simple things she did for you. Go for jogging, hiking, picnic or any social gathering that will give her a sense of comfort.
don't say you have a green card , don't keep saying I am rich in Nepal or so so....if she is a family oriented, one of a kind then she will come after you. Also if she has a facebook add her soon. Do not write politics things on your facebook a lot may be one or 2....is ok . Also try to show how much you love Nepal and Nepalese culture...(it melts any decent girls I bet)
Go for it...and all the best.