I won't say too much as it would really put me but I have a half sister I'm very low contact with despite being v close to growing up. We have the same Dad (total EA narcissist) but different mums (he's not with either of our mothers now). Barely 3 years between us but she had a much shitter time growing up than I did because her mother was also quite EA. Mine wasn't and I'm still really close to my mum.
She thinks our Dad favours me over her which isn't remotely true, he was awful to me growing up and I don't see him much now at all. However this resentment grew and grew until she just stopped having contact with me altogether really other than a couple of texts a few times a year.
I miss her. I found her v difficult to deal with in many respects but I do miss her and feel sad we aren't close any more. She has never met my son.
I know there isn't much I can do but it just makes me sad. Is there anyone else in a similar situation - where you're low/no contact with someone but you still miss them?