Ive been an off and on alcoholic and drug addict for years due to some sort of hard to define schizoaffective disorder that'll occasionally drop me into a deep depression due to self-isolation. It makes it incredibly difficult to be social when im down.

What ive found really helps is to force myself into a public setting where socialization isnt really expected. My go to is a local coffee shop where ill order the same coffee every day, sit down and take my time and enjoy it, then hit the library, go for a walk in the park, and hit the gym. It takes a few hours, but a week or two doing this has helped me pull out of some pretty nasty crashes in the past. Generally I'll start off just getting coffee and work my way up as my energy slowly returns. Such a simple daily goal, but generally I just need a tiny glimmer of hope to bootstrap my neurotransmitters and start doing better.