My last sibling gone
Being the youngest daughter, having five sisters and three brothers, I often wondered what it would feel like if I were to be the only one left. It's something one can't imagine until it happens. Even if a death is expected, the emptiness felt is undefinable. Noone left to share with you the growing-up stories, family life, etc. Hard for others to understand the closeness of sharing with siblings. At times I feel they are all within me, with all the memories. And, at other times I feel so alone.
My children are deeply involved with their own lives--my daughter doesn't show much outwardly compassion, one son isn't on speaking terms with me, and the other son is loyal to his brother. I guess I'm having a "pity party." Time will help but as you get older, there isn't all that much time left. As others have said "one day at a time." It just takes time.