Naak, Dont go at all. As far as I can understand, she has invited just as a formality or to make you feel bad. She is gonna certainly laugh at you along with everyone else. Sab le balekai batti tapchhan, tyo bhoj ko ramjham ma sap le timrai kura katchhan. Baal diyera basa ghar gaja saja tanera. The best thing to do is the "Pandhra Gaate" thing but its kindda difficult. Something else you can do is to find a pretty girl and ask her to go with in the wedding acting as your girlfriend.