@chujan,

You can walk down to Robert Morris University in Moon Township, and post what you posted above to their ad boards. Or, ask around for Int'l Students Services (or similar) office and add a sticky by their entrance. You can also speak with the staff(s) there and see if you can meet up with some Nepalis looking for a room/room-mate. Also, I believe there is a Nepali professor, who might be able to help, or at least introduce you with other folks.

~@~