Gotta say though, I wouldn't mind the unceremonious death of Jadzia if it wasn't wrapped up in the sexist contract disputes, because the character is the perfect one to kill off, because she was (in a sense) only mostly dead! Imagine if we had gotten the chance to see Ezri talk to Jadzia, like we saw Jadzia talk to former hosts.
The two of them could work through the complications of living on the same station as Jadzia's husband, how her death wasn't some honorable warrior's death like Jadzia (and Curzon) would have dreamed about, and how Ezria wasn't ready for the responsibility of being a host. There's a lot of really interesting stuff writers could play with there, and I think Adira and Gray in Discovery have showed there's some nice storytelling potential there (the same kind of additions to canon could have happened with Ezri and Jadzia, in terms of a traumatic host transfer causing unexpected bonds between the hosts' memories).
I struggle to find what to say, because I'm just some random schmuck on the internet. Plenty of people post vile comments, so I'm going to post a saccharine one, in honor of your friend.
Others have said it already, but I'll say it again because why not: your voice online has been a pleasure.
Grief is terrible, and I'm sorry you lost a loved one. I'm lucky enough to have a friend like the one you describe. We're a big part of each others' support system, and a lot of what we talk about winds up being Trek. I say that only to let you know that your grief will help me remember why I should cherish my friend, while we're both around. Maybe that doesn't do you any good, hopefully it doesn't come across as selfish/insensitive on my part (if so, you have my apology in advance), but maybe it's some consolation that you and your buddy are inspiring others who have never even met you. We all have an effect on people's lives, whether we know when it happens or not. Just being some kind of role model, even in a small way, will influence people for the better. That's my hope, anyway. So you and your buddy have clearly been doing this for a lot of us, here. I'm sure elsewhere. You don't owe any of us anything, but I know seeing your positivity makes me smile.