Do i confess...again?

A couple of years ago started liking this guy at uni and i confessed to him, but he rejected me because we weren't really friends, just had some mutuals. He said he would only date someone he's friends with.
Over the last two years, we've kinda become friends (I hangout with his roommates a lot so we end up in the same spaces), but it's always a little awkward. I know he still thinks about when i asked him out, because he's mentioned it to his friends recently. I also know that last year he liked one of his close friends (she doesn't like him), but idk if he's still into her.
I've always tried to be respectful and stay out of his space, and he's always kept his distance physically, but last week we were doing a puzzle with our friends at his apartment and he sat next to me, close enough so i could feel him breathing. He'd accidentally touch my hand and immediately apologize, which happened at least 5 times (once it was my knee, which I'm still trying to figure out how he got there). Even after i stopped acknowledging it, he would still apologize, which kinda just drew more attention. He would give me pieces that he thought i was working on and sometimes would take a piece, lean in and softly ask where i thought it goes. When I tried to leave to eat (i had been there for several hours), he said that they had food there, and when i said i specifically wanted chips, he said that they had those. When someone asked if he actually was serious, he hesitated and said he didn't actually know, which made me feel like he was just saying whatever so i'd stay (which he's never cared about before). We'd joke a bit here and there, and i admit i may have been flirting unconsciously by teasing him about his vocal stim habit of singing. My memory, of course, is unreliable. I should add that his previous(?) crush was also there, so idk if that influenced him.
My friends think he's into me, at least a little, but I'm not sure. He's also graduating this year, so i won't be seeing him after that. Is it worth saying something? Besties i need help