This always frustrates me, people assuming that stoicism is just not showing feelings and not caring about things. It's fucked up and not correct at all. I'd also recommend Seneca's Letters from a Stoic although I found it a bit drier than the ones you recommend.
Hmm, that sounds like a bad idea. I think I'll just allow todays minor problems that I don't have the energy to deal with to become major problems tomorrow that I also don't have the energy to deal with. Yes, that sounds like a much better idea.
Bit of a cliche one but I have been a pretty nerdy and sedintary person for most of my life. I decided to try working out at the gym, initially wasn't super into it but then became addicted and now I spend quite a lot of time outside work on my fitness and really love it.
Aging sucks for sure. I'm slightly ahead of you there and my personal cope has been to try and become the fittest I have ever been by the time I hit 40. Having a goal like that helped me keep the existential dread somewhat at bay. It's good that you're finding your own way to work through it. Good luck to you, friend.
Sorry to hear you're feeling down about this. It's understandable, but it seems like you might be reading too much into it and getting yourself more down, too. You say "who cares about the feelings of a 36 year old" for example which is your mind jumping to a conclusion you have no evidence for. In fact you have contrary evidence because people did send you birthday messages at least. My advice would be to do something for yourself if you can. If having your friends involved in your birthday is important to you though you might have to make that happen by organising something with them.
Anyway, it just sucks that you felt kinda bummed out on your birthday. Hope you feel better and you can find a way to celebrate and appreciate yourself.
Well, they won't be once I bring them inside, will they?