Am I just wasting my time?

There's this guy.. We used to talk ALL the time and flirt and stuff. His best friend told me that he (my crush) likes me. And this one day this girl came up and she's like "Oooh, you like her!" and then he like covered her mouth and he's like shh really quietly and then he's like no and i'm like what? and he's like oh , nothing and then he smiled really weird. And theres alot of other stories too but that's not really my point. Lately he's kinda been ignoring me. He doesn't talk to me that much anymore. But he's ALL I think about. And I like him A LOT! But am I wasting my time? Should I just move on? Or wait for him to make a move??