Still nursing.... 😳 HELP

Is anyone still nursing your (not so little) LO? I am, but am ready to start trying for #2 and need to stop. My daughter doesn't like any substitute for breast milk. I have tried EVERYTHING (admittedly even chocolate milk). She does have yogurt and cheese throughout the day so I know she is getting calcium, but I am having a hard time getting her off the boob. She only wants it when she is with me and it is bedtime. Which I am feeling that it has become more of a comfort thing because I don't have much left. 
I need some suggestions as to how to stop!! What worked for you?!?!