Do you ever just feel sad?

Sad at the unfairness of the world, still sad at the silly pet you had that died when you were 3, so sad that a song made you cry, sad that so many loving, talented, amazing people have left this world, sad about the things you’ve missed out on…just overwhelmed with sadness?

If so, what makes you sad? ...especially personal, specific things moreso than huge general things.

Today I’m just sad, and can’t put my finger on it. My sister’s boxer isn’t long for this world, and I love his spirit and that makes me sad, but it feels like more than that. But I don’t know what. Ever feel like that?