What else comforts your son? If he is feeding for comfort, offer something else to soothe him. Don't cut out altogether, but maybe try to drop (say) feeds in the morning, so just when he wakes up then let him feed at lunch. Gradually increase the time, so go to afternoon snack time, then dinner, then eventually just first and last thing. You can do this over about a month, which is fairly quick. You can stop offering the morning and night feeds when you're ready then: I found when we got down to two feeds, if I didn't offer DS wasn't that interested.

I'd say that this won't be easy at first, but as you get another comforter in place then it should go fairly quickly. And will be easier on your body than just cutting out everything.