B..
My son didn't eat much, until I took him off formula. I weaned him off the bottle at 12 months, because he had to eat something. Sometimes, kids only want what they know. Sometimes, we have to force their way a bit. It sounds like you are ready to wean, and he really needs to learn other feeding habits. I think a woman can breastfeed as long as it's a mutually desired process. To me, it sounds like you don't necessarily want to...and he doesn't necessarily need to. (As far as him using it as a crutch, rather then really eating.) Have you talked to your doctor about the weaning process, and the best way?
Really, the only way for him to not breastfeed when you want him to eat...is to not give in and breastfeed him. It's YOUR body, not his. He is kind of owning your body right now, so it might be best to start weaning.
ETA: Penny, I'm really not sure if your condescending jab was aimed at me...but it was inappropriate no matter who you aimed at. First of all, I didn't produce a DROP of milk, so please don't assume I (or anyone else here) doesn't value nursing. Secondly, I specifically said "I think a woman can breastfeed as long as it's a mutually desired process." She said she wanted to wean. Lastly, GET OVER yourself.