Much respect for sharing your circumstance, and my condolences. I've had a hemorrhoid and have IBS, but other than I've been fortunate enough to mostly have good/clean bill of health.
As for the bolded I'm right there with you and I'm 23. In some respects, it's sobering. I know once Brady and Bron retire I won't have personal/childhood link to either sport anymore. So I won't watch them. Power was the last show I actively watched and once they killed the daughter and started angling toward the son as a main character I stopped caring, and never got invested in another show. All the things I enjoy get ruined by others, so at this point I just expectations. The thing is when you have low/no expectations for others/outcomes you inevitably become more withdrawn/apathetic to others/outcomes, which along with environment and self comprise life.
I more likely than not have mild depression (never been to a therapist), but when things are bad more often then they're good, why would I be optimistic/upbeat from a logical standpoint?
There is no alternative within the confines of logic. If you go the delusional optimism route you just bump your head on the same spots you have countless time prior. All you can do is just find peace of mind/some sense of being content in not caring what happens/how shyt goes.
It is what it is, and it be like that sometimes (most of the time) are my mantras. I just take it day by day and try to knock things off my to-do list and hope as I progress the Ls and Ws become more 50/50. I don't think they will I think over time you just become more adept at dealing with/processing Ls. I've said on other threads on this site, if not for immediate family I probably would off myself because I by and large don't enjoy life. It's really just music that I enjoy, but between the day to day I rarely get to listen to all the unheard albums sitting on my downloads folders.
Sidebar that's somewhat related my good breh, have you ever taken the Meyers Briggs Personality Test?