We must accept that our adult children and our grandchildren probably have busier lives than us, particularly if we are retired. I never just ‘drop in’ on my daughter and grandchildren. I say to my daughter, just let us know when you’re free for a visit, and I leave it up to them. OP, try not to be sad about the situation - it’s just how life evolves. We don’t see our grandsons as much as we used to when they were little but I always let them know we’re there for them, should they need us. Perhaps, as your granddaughters are growing up, that’s the sort of relationship you should cultivate with them - it’s not necessarily about seeing them frequently, more about letting them know you’re still there for them, in the background. Quality not quantity!