I was diagnosed at 28, a couple of years after my older son. There is little to no help here for anyone over 25 - I was told I may benefit from CBT to help deal with certain issues but was referred back to psych for fucking talk therapy. No thanks.
I honestly don't know how well I would manage alone, as I've never lived alone - I left home at 19 to set up home with Mel and we grew into adults together. Mel is my reality check.
Yeah, I lived with my mother until I was 24 then moved in with my partner, left him 5 and a half years later as we were both aspies (he knew he was, but neither of us had sussed that I was at that time) and other than a year in a shared student house, have lived alone ever since. I wish I could find someone who I could live with and was compatible with as much as I need my own space, I also need companionship. I have 1 friend who lives in my city and that's it. I have often gone weeks, months without speaking to anyone face to face. It is good you have someone. I was sort of forced into independence by circumstances really.