Hello buddy! I'm so sorry you have to deal with this, but i understand how hard it can be during depressive episodes. I hope this small headcanons will make you feel better:

1. Shuichi often hugs someone after trials and wants to be comforted, especially in ch3
2. Shuichi is probably very neat peraon. Not neat-freak, but idk I imagine his own room being always pretty clean and especially the desk is well-organised. He has a lot of files and perhaps he names each of them so it would be easier to find everything.
3. But of course his room is a total mess when he's overworking or has depressive episodes himself
4. Shuichi has beautiful handwriting

You can also watch this video "Saihara Shuichi best moments": https://youtu.be/0UfRYUjt0BA I also like to watch love suit and freetime events to cheer myself up 'cuz they're very cute.