How to know he likes you..?

Today, at school- We were in drama, and we were doing an activity that involved us holding ha-y me and listens even when I'm not talking to him, and sometimes- he'll remind me of funny little mistakes that I have done waaay in the past- He giggles at my jokes and when I'm not even directing them to him.. Does he like me? He's moderately popular as am I.. But he is a huge flirt- he seems a bit more relaxed around me though.. Help! Preferably someone with past experiance:) Thank you in advance:):) =^-^=