Is my friend using me to get her stuff?

Every time im with my friend Leah, i always end up giving her stuff, or she gets her way. I give her food, she always ask me if i can make stuff for her (and i can't say no), I always giver her, her way and its getting annoying because I dint like to say no to her, shes my best friend. So i said to her "You have to do something for me, or give me something, i do everything for you" and she said "Im giving you, the gift of friendship!". Its really annoying is there anything i can do, i want to be her friend, but not if she acts like this.Or is she just using me?