weaning after a year

I've been breastfeeding/pumping for almost 13 months. Over the past month I've dropped my pump sessions from 4 times a day to two times a day. I was feeding once a night, but in the past couple nights my LO has started sleeping through the night so there goes night feeding. I haven't quite figured out how long I would continue pumping. I figure until my milk runs dry but I don't know. I get sad when I think about not pumping anymore and not providing breastmilk to my child. I know it's part of coming of age and the natural progression to other forms of milk but I don't know I still feel like my LO should be drinking breastmilk. I'm super conflicted. I want my child to grow up, but I don't at the same time. It's such a weird and confusion feeling. I know what I should do. Wean baby from the breast and breastmilk. No night feeding. Milk from a cup. Easier said than done :/