On my 28th birthday, to my 18-year-old self

Today is my 28th birthday, which means I have been an adult for exactly a decade. Legally, anyway—while I might’ve been sure I was 100% an adult the second the clock ticked over to midnight on January 19, 2009, looking back I’m pretty sure you don’t actually feel grown-up until at least… 23? 27? 35?…