The only problem I can see here is getting ur gf to US. Find a way for that dude..like as a F1 student or something. Then u can marry her right away over here...You going to Nepal and doing a secret marriage doesn't make much sense to me other than u can bring her here once u get ur citizenship...And howz the secret marriage supposed to help u any way if u can't disclose it to nobody?? That sounds to me a like an old Hindi film.