Does he still like me? Or am I wasting my time?

if you like him then stick to him only and tell him and wait for it. dont go out with another guy in the meantime. he's prob not happy coz he probs thinking what the hell did i say no to her and regretting it. ask him, tellhim u like him, talk to him. find out. hint to him and if its a no then mention in a text or conversation that you think ur gunna start dating and then see him running for you haha