Bro, there's no point going back. I'd urge you to get paper marriage ( nakkali ). GC ayepachi ahile samma bigreko sabai kura bancha. If you were to go back, you'd have to start all over again. And there's no point going back to Nepal ASAP because chances are, since you've remained here illegally, you might never get a visa to come back again. The choice is yours.