How do I stop missing my childhood?

I am a 53 year old mum of 3 with a relatively happy life and a lot to be grateful for. And I really am grateful, so why do I keep missing my childhood, parents and childhood home so much. Every time I think about being a kid, my lovely home and parents it physically hurts inside and I cry. Every time. I took my youngest who is ten to my old neighbourhood park and saw an old school mate from a distance. It brought memories flooding back and the grief at the loss of my childhood was so painful I had to go sit in the car and cry while my husband took my daughter to play. I dream about my home and am left with the sadness all day when I wake. I am a pretty emotionally stable person who can cope with the usual issues life throws at me. But this grief when it happens feels overwhelming and it's getting worse. What can I do to stop the hurt and feel joy in the present and future again?

Thank you for answering, you're right, they are intense feelings and I will explore the possibility of counselling.