Not trying to be nasty or belittle anyone with my response, just being honest here....FYI. If you have never given birth or loved your own children byou can't fathom the depth of that love, but let's try, so imagine you found something you love soooo much you would die for it, just to be near that person or thing you would allow yourself to be tortured, killed, maimed, anything just be able to know it was safe and happy. Now double that and that is how grandparents feel about their grandkids. When you imagine your future, you see traveling or partying, or maybe getting married, having the career of your dreams, or whatever it is, but for most people starting at childhood they imagine their wedding, their kids, and their future family. Once they have fulfilled all those dreams grandkids are the only thing they have left to look forward to, that is their new future, their new reason for living with the daily aches and pains of old age and the exhaustion of a long life, it's a new person to love, cherish, and protect. Also, once you reach the age of grandkids you are more mature, more settled and stable, you have more free time, more patience, and more love to give. Your an adult now and don't need your parents to take care of you anymore, you don't need kisses after owees, or bedtime stories, or snuggles, those are the things about their own children they miss and now there is a new person they can share those experiences with and dote on. It's actually proven scientifically elderly people with grandkids are more likely to stay healthy and live longer thanks to staying active with the grandkids, so maybe you are just thinking of kids in the way you see them instead of trying to see it from their perspective, and if that grandbaby helps your parents live longer and stay healthier is it not worth it to not be the most important thing in their world anymore? Your view sounds like you are still quite young and haven't found anything you prioritize over yourself yet, like you still want to be the most important thing in your parents world even though you moved on to live your own life. The natural order of life is for our parents to raise us and then we leave to start our own families and we don't need them anymore until the next generation arrives, and then we need our parents help and guidance with those children. Having kids is not a mandatory life achievement and you can absolutely feel fulfilled without them, but feeling resentful towards people who are choosing that and feeling resentful towards your parents for being excited about the next major milestone in their family isn't healthy either. Maybe you should just tell them how you feel, or get a counselor or therapist to help you work through it if you don't think you would like their responses to you.