Saying "I'm sorry, I suffer with X and sometimes I'm not very good at controlling my emotions but I'm truly sorry for my behaviour and acknowledge it was awful" is SO different to saying "I can't help it, I have X, that's why I reacted to you like that" and expecting people to suck it up and make allowances for you despite no acknowledgment of how you affected them.
this is probably the best comment on this thread (i know it's frowned on but there's another thread asking if it's right to callout Kanye on his anti-semitism because he has MH issues. My answer: sure, of course you should. And the comment above is a very good example of how he, and others should apologise)
It never ceases to astound me that, as in the OP, there is someone in the group who is clearly struggling but OP complains about them being flaky instead of asking if she's ok, and (or) jumping in, knowing this person struggles, to make the reservation herself.
Am currently reading up on ADHD and how it manifests itself and is diagnosed, and it is certainly an eye opener. Modern life is very stressful in ways we haven't had before. And previously? People with poor mental health were ignored, bullied, told to snap out of it, resorted to Mother's Little Helpers, were admitted to psych wards and often killed themselves. Or lived lives of quiet misery.
Poor as resources are I for one am glad that we are making progress.
Am not as impressed with people who use MH issues as excuses for being awful or lazy.