My son and I were going to the store and he was very quiet the whole way there and back. When we got near the house I asked him if he was sad about something and he said "yes"
I asked him what it was, thinking he was say that he missed his mom or would miss his brother who is soon going off to school, but he said "I miss Jake."
And that's all he said, but he said it with a deep and genuine sadness. I told him that I do too, every moment for the rest of my life.