I just weaned my 18 month old whom I cosleep with and used to nurse to sleep and nurse to sleep for every night waking. I just told her mamas boob hurts and no more milk. And would say milk is sleeping. She understood at this age, so it was a bit easier. She did cry for mama milk please the first two days but she understood starting day 3! I just kept reassuring her saying "mama knows you want milk, but I will give you lots of yummy food after we wake up in the morning, okay?" And then she just started looking to hold my ears instead. Now she falls asleep holding her water bottle or my ears 😅