Hi david,
First things first. Apply to a university that offers night classes. Or an online university. Do it now, the deadlines for many of them are fast approaching. At least do rolling admission. Otherwise another year will have gone by.
The people you meet in school will be your new social group. You will be a few years older than many of them, but will still be young enough to fit in. Instant confidence! Even if you attend school online, that should give you a confidence boost.
I’m guessing the rejection is coming because people sense a bit of desperation in you? I don’t know, but being around the student crowd should help.
Good Luck!
Inky