M.O.
I don't have an answer for you -- sorry! -- but I would respectfully encourage you to keep nursing when you can. If you can pump, even a little, that's best, but even if not, I would recommend continuing to nurse when you're with him.
If you have to get him used to bottles, can you have one of his caregivers try giving him one? Professional infant carers are often very good at this, and he may accept a bottle better from someone else. With you, he knows you've got the real thing going on.