I guess you know what you need to do to move on, it's just a matter of actually taking that step. What a shame they can't see what they're missing out on. It's only natural you want your parents to care for you and show an interest - parents are supposed to do that! They're supposed to want that! You should expect and demand more
It reminds me of my mother's shock one year when her mother actually called her on her birthday All I can say is she's a million times better as a mother (and grandmother!)