When someone’s died, you can’t really love them anymore.
You can love your memories of them, but isn’t that just sentiment for your memories?
You can love how they used to make you feel, but isn’t that just the comfort of nostalgia?
You can admire their good values or deeds, but those values really belong to us all. Your lost beloved was doing a good job of reflecting them to you.
You can no longer love your lost person in real time, but you can always love the idea of them, the good values they held, and the inspiring examples they left behind.

