I really like that you made this comic. It takes a lot of bravery to not only post the words you did but also make an entire art work out of it. I certainly don't think I could; I've become an expert at dancing around things I don't feel comfortable discussing, but you always seem to come across as straightforward and genuine. It's really admirable.
I'm sorry to hear about your physical condition thing, that's got to be tough. :( I think you make a good point when you mentioned that people don't have to pretend to know how you feel in order to help. In fact, IMO it usually makes things worse, but maybe that's just me.
Spirals are so hard to get out of once they start, and when you're in a bad mood you almost don't want to get out of it. It kind of reminds me of I saw a while back. I think that post helped me realize that sometimes when you're most vulnerable is when the whole thing starts, not when you're already deep in it. That's the truly hard part.
In any case, you're absolutely not worthless! I don't come here every day because I'm bored, I come here because you're all really neat people that I enjoy being around when the opportunity arises. The next time you're feeling down and maybe there's no one else around, just imagine a little Alanzi figurine doing some goofy cheerleader dance or something, trying to cheer you up. Actually, I just unlocked /mandervilledance in FFXIV so maybe pretend I'm doing that, oh my god it's so dumb I regret it already