i plan on doing tandem and extended breastfeeding. I plan on breastfeeding my son until @least his…

i plan on doing tandem and extended breastfeeding. I plan on breastfeeding my son until @least his 3rd birthday. his first birthday i would love to go past but thats my short term goal. how can i handle the critism? what are things i can say when people butt in and ask if i'm still nursing and tell me to stop?