@thakkola, not all men are real men. Some go after the dead relationships and create chaos and drama. I call them 'pu$$ies'. Unlike you seem wise and distinct as you've decided to move on and I feel the good virtue as you've wished good for your ex. That's what a real man would do. I'm also happy that things are turning good for you as you've met your childhood crush and coincidentally(I hate this world co-incidence anyway :p) things are turning in favor of you.

Now you may think she's married, you're gonna get married(supposedly) here(or there wherever) in US , wth, why should you even bother to go there and have all those hassle of divorce and stuff. Well, many have done that without a problem. That old relationship is dysfunctional. They're on their own now. Who cares right? 

Well, I've also seen that this guy getting so rich, and all of a sudden this old ex-girlfriend(precisely ex-wife) shows up posing herself as his wife out of nowhere with all the legal proofs. The guy has no other choice but to share most of what he earned.

So, long story short, divorce her immediately, leave no trace of your once good old relationship with her. Think of your future. And, yes, you can file the paper by yourself if she has betrayed you. There is a separate law for that. You need to talk to other lawyers. And, yeah you to be in Nepal. There are ways around. Get help of your family members. (yesai beijat, usai beijat .. face it bravely bro)