J.F.
Hi C. -
I have night nursed 4 of my 5 children through their second year and I know it is a challenge at times (even though it is one of my favorite mothering tools!). They go through spurts of nursing more (as your baby is). You have two choices: 1) either continue to nurse at night and wait it out to see when your child will naturally sleep w/o nursing as much, or 2) night wean (as Betty suggested in her post). As far as how to go about doing that, there is a wonderful article on weaning toddlers from night nursing and I wanted to share that with you. http://www.drjaygordon.com/development/ap/sleep.asp
You can try offering a sippy cup to your child in place of nursing, but that typically hasn't worked for my kids until they were weaned because the nursing is more of a comfort than the drinking. :)
Blessings,
J.