Suddenly my LO seem attached to my breast and refused bottle feeding. How to make him drink with bottle as I am going back to work soon.

maybe he knows you're going to work soon...try to get other people to feed him (and hide/get out of the house) during feeding time so that he have to drink from the bottle? also try talking to him...telling him mummy still loves you even if you're drinking from the bottle etc etc...babies do listen. :)