It's a habit now, mom. She doesn't need to nurse every two hours in the middle of the night like she did as a newborn. I have a feeling that she's using you to snack on, like 5 minute sessions. Regardless, you need to stop doing the night time thing and night wean her.
If she is eating any food now, that will help. Give her cereal at night before her last nursing session. Put her down still groggily awake - not asleep. Let her go to sleep without you holding her. In two hours when she wakes up, let her fuss for a bit, and then go in and sit in the floor beside the crib, and touch her leg. She'll stand up, but stay in the floor and eventually she'll lay down to be closer to your hand. Don't talk to her, don't pick her up. You are having to teach her that the night bar is closed and that you aren't going to give in. Instead, give her a little more food during the day to make up for it.
In the coming months, teach her to drink from a cup. If you pump, put breastmilk in a cup for her. Other watered down juices are good too. At a year, work on her drinking regular milk in a cup. You might warm it up some because she isn't going to be used to drinking cold milk.
If you want to sleep some at night, mom, then do this. Just know that you cannot be wishy-washy. Either do it, or don't do it. Anything in between will just make you absolutely miserable. If you give in and pick her up and feed her, she will know that all she has to do is scream for it. If you don't give in at all, she will stop waking up eventually because there will be nothing to wake up for.
Good luck,
Dawn