I sympathize with you because my son is two and a half and I only solved this problem for recently! I don't know what your situation is, but for me, because he had been nursing every hour on the hour I just brought him to bed with me. I know you will get a wide variety of responses to this so I can only tell you what I did, and I'm really happy with it. Only you can decide what is the best for you and your family but if anything I can say will help, I'm glad!! This is a miserable situation and I know it seems like there is no way out of it.
A lot of the reason I would always say yes to nursing at night was out of guilt for being at work. I felt I must be 100% available to him at that time since I wasn't during the day. And you can, but it doesn't have to be nursing. At first I set times, of when I was willing to nurse and when I wasn't. During the times I would not nurse him, I was very comforting to him, "I would explain mommy loves you and sleep is good for you" and rub his back, because yes, he was MAD! I did still have him in bed with me because for me personally, that was not a problem, as long as he slept and let me sleep! For you it might be different. After about 4 days, I noticed that he would still wake up wanting to nurse, but when I said no he did not fuss with the same intensity. Just a little bit and then he'd roll back to sleep. Then after another couple of days, it got worse again, but the key to this is to stick to it. And eventually to my amazement, he would not wake up asking to nurse, he would just sleep. I truly had reached a point where I thought that would never happen.
The trick really is to push through during those moments, she is upset, knowing you are doing something that will be of benefit to both of you. I feel so much more engaged and patient. Definitely healthier and happier getting more sleep. It really does feel like a different life.
My pedi gave me an pamphlet with an excerpt from Ferber's book and wanted me to try it. I wasn't comfortable doing it that way and she said "You know your way will take longer, right?" I said yes, and that I was ok with that. I am sure there will be many people who offer the Ferber method and other ways that are happy with their choice too. You will have to choose what is best for you. It could be one those, my method, or something in between. Whatever your approach, just keep your goals in mind and choose something that feels right to you and I promise if you stick to it, it will WORK. For us, it took about a month to really be sleeping through the night, and there were moments I was so close to giving up but it did happen. Good luck to you, I know where you are at and it is a really frustrating place to me and can seem like there is no hope other than for her to grow out of this. For us, it did work though and I would love to see you come back and tell us you found something that worked.
PS--Just came back to add-my kid associated my breasts with sleep SO much that he referred to them as "Naps", LOL.So when he'd wake up, sometimes I'd say "Naps are ni-night" so he knew- they are sleeping and so should you!! ;)