I hear you! I am weaning my 18 month old as we speak (my boobs are about to explode!), my DD would never touch formula, expressed milk or a dummy either and solids were a big problem because she only wanted breastmilk.

I am offering advice that was given to me but I didn't take it so no promises, maybe get someone else (mother, husband) to feed her a bottle of expressed milk with you out of sight. It will take a few times but your baby won't starve itself. My sister in law used to send her husband in when her baby cried at night and eventually he learned it was cuddles and no milk so he slept through.

Good Luck!