Does he like me?.....?

So there's this guy at work who I kinda like.. I speak to him most days.. He randomly comes and talks to me while I'm working or smacks me in a playfull way when he goes past,but wen he's with the lads at work he always embarrasses me around them by sayin I'm lookin at his bum and other stuff. Then says sorry just kidding and winks at me. I can't walk past him without him puttin his hand our for an high five ha.. his he bein playfull and friendly or does he like me?