Bi, he seems to have internalized homophobia but has dated women and a man. He acts a little different around me but makes a lot of gay jokes/flirts with both his male and female friends. I wanna tell him I'm single now (a while ago, I had a GF) but don't wanna make it obvious I like him.

He's single and athletic, he thankfully sees me not as a dorky loser. (He had an ex BF and GF obsessed with status [when we were 14-15] and the BF HATED that I have autism. He insulted my outfits, and I was honestly jealous of Karl at the time and attracted to his ex. Looking back after around 4 years, I have no clue what I saw in Karl's ex. He was "cool", social, "better" than anyone who wasn't Karl, had no time for "losers", etc. He still thinks Karl's flirtatiousness means he wants his ex back despite flirting with most everyone.

He has convinced people that they were still dating despite no longer liking guys. (Karl's ex is straight now). Karl's ideal friend is athletic and popular, but I'm smart(when i wanna be) and help him with stuff.