S.W.
You should try the La Leche League. They are very helpful with all aspects of breastfeeding, including weaning. If he's really not ready to stop, it will take a few nights of him screaming, but if you really are done, stick to it, and he will give up. I was able to "night-wean" my daughter by having my husband go to her instead of me, and since she knew that there was no milk there, she was ok with it, and got used to it quicker. My son is 2 1/2 and still nursing a few times a night, because my husband is working a more difficult job now, and doesn't want to do the night stuff with him. I don't really mind, because nursing is so good for him, I know he'll quit eventually. But if you don't want to breastfeed anymore, it's important that you shouldn't keep doing it. Good luck.