Does he like or not..does he like her morreee?

so there is this guy i like,and we really havent talked that much he looks at me and i know he thinks im pretty,we just started working togther,anyways.we talk a little but there is a girl that he always makes fun of and he punches her lol..well she does too.they play around like brother ans sister.its annoying.whenever he looks at me though he smiles..and once he asked me a question and i got interuppted he asked me to presume.he didnt forget about what he asked me(simple question,cant even remember it)anyways..he called me sweetheart once and said i had a million dollar smile..hmmm i dnt know.anyways what are some things i can do to test him.and also whenever he comes to talk with the other employers he is always coming to my side..and cracking jokes.hmmmmm.help me out ladies and gents.