Who is dead to you and how did they make you feel that way towards them?

My relatives who are still friends with my ex.

Anyone who makes me think I'm important to them than subsequently seems to forget I even exist, though they're not officially dead to me until they come back just because they need something from me. And then shove me right back from their realm of consciousness as soon as they get what they want.

a sibling, even after a few years trying to connect with them, all they can do is lie and avoid me then accuse me of alienating them, they show hatred towards me, I have realized trying to connect with them is beating a dead horse, and chose to act as they don't exist

I wouldn't say dead ..more like I lost faith in them. But I don't want to say who ..too personal, srry