I'm sorry you feel invisible here, but in my opinion, it's an invisible medium.
This is perhaps the first time in a year that I have checked any of Livejournal without prompting. My FList has very, very few people who still post here. There is nothing out there like what LJ was.
This is not exactly what you want to hear, and I've had some tough conversations with people who were unhappy when I left LJ, but social media is overwhelming, and I already spend too much time on it.
I know you're trying to share that you're bummed, and you should do that, but no one has the obligation to reply when you put something up, and no one knows when you really want a reply vs just splashing it out there unless you state so. Having expectations regarding the behavior of others is a good way to make yourself depressed, IMO.
I promise you, though, if you ever write me an email and give me a real opening to reply, I will do so. I am pretty fanatical about replying to emails, unless they seem to be at an end.
I am very much looking forward to seeing you very soon, my friend.