Why don't you write that you lost your passport? I think you need to file police report how you lost your passport. They will write you a report. You have to submit application along with report, $300 fees, and 3 PP size photo. You don't have to mention you are out of status, or married with any other citizen because you still consider unmarried back home. I hope this helps. Follow the link below. 

http://www.nepalembassyusa.org/passport.php