Dear Angela,
I don't know anything of you, and of course there are so many ways in which a person can be, and feel, alone. What I am writing about here is just one little side of it. I don't presume that it is what you might mean by, "alone".
I was an EMT at the World Trade Center on 9-11 and took a bad beating that day- physically and emotionally. As with things like the Iraq war, the WTC is well known - so at least people know in a vague way where I might be coming from.
But I know, and you probably know a lot better then I do, that in emergency services almost all of what happens to you emotionally is never seen or acknowledged by anyone else. And in that way, it is very very alone.
There are images that haunt, things that no one should ever see. But you probably have. Screams no one should ever hear. But you probably have. You alone.
But in another way, we are not alone. There are other images, other screams, and those have been seen and heard by other people. So maybe even though no one else has had your unique experience, there may well be other people who can relate to it. In that way, maybe, we are not so alone.