Firstly congratulations on breastfeeding for so long, well done, it has been 17 yrs since i was doing that, however i too fed my girl until she was 16 mths old,i think it does depend on the child, for me weaning was no problem at all, i just did it slowly and she just accepted it without even much as a whimper, however not every child is like that i guess, i can only go by my own experience, but i think you have to strong about it, and just do it, Ty will miss it but adapt,i think giving him the option of a new feeding cup and encouraging him to use it like a big boy might help a little, remember because they are big enough to ask for it, they are probably big enough to understand somewhat that mummy is not going to do it anymore,good luck.