It's difficult one really. On a site as big as this you will come across people who have had such different life experiences.
I have two sons. My eldest died when he was 18 years old (he would be 25 now). My youngest son is 23 and lives with his girlfriend.
I miss their younger years. When they both needed me.
I miss my eldest in the most crushing way.
I feel melancholy for my youngest as he doesn't need me in the same way as when he was little. But I'm thrilled that he is living, loving and enjoying life as a young adult.
I veer wildly from being the bereaved parent viewpoint of wanting to scream don't be sad your children are growing as this is what they should be doing; to missing that mum role in my youngest son's life; whilst grieving my eldest.
I feel pride in my son, growing up, leaving home, but I still feel melancholy.
Parenting changes as they get older. I actually find this bit harder than when they were younger - I'm still finding my way as a parent of an adult son.
It's ok to feel melancholy.