Ongoing invisibility glitches...

Sometimes I feel like I'm spending hours and hours and hours working on stuff that hardly anyone cares about but me. Which is fine, I guess (as long as I care about it and enjoy it), but it also causes me to feel sort of invisible and questioning meanings.Then it sometimes reaches a point where I'm not even sure why I'm spending so much time and attention working on my individual invisible stuff inside my individual invisible brain-land. It's not loneliness; I almost never feel lonely these days (I love having time to myself/ by myself to do my own thing); it's more like what is the point of this, this, this or ANYTHING sort of thoughts/feelings. Feeling semi-randomly invisible in regards to stuff that doesn't feel invisible to me, but maybe it almost is anyway.And then when I keep working away in my invisible land anyway, I start thinking of black holes and wondering if part of my brain is some sort of black hole. Or more like a tiny wormhole inside a small book, probably involving poetry. Maybe even poetry that I spent a lot of time, effort, energy, and even genuine passion creating, but not long after it's completed, it might soon turn invisible again (or it might not, so I keep trying...)...When I was younger, my feelings of invisibility manifested themselves in a more physical manner. For example, if I was in a room full of people, my brain would try to convince me that nobody could see me, even though I could see them - and I'd have to look in the mirror a lot in order to visualize myself and prove that I physically existed. But now it's more a mental/emotional thing. Yes, I physically exist (and yes I have real thoughts, feelings, and awareness), but does it really matter? Yes? No? Maybe? Ask the latest Ouija Board?I most likely don't matter very much in the vast scheme of things, but do I even matter that much on a small scale? I mean, sure I matter on a very small personal scale to myself, but...