Idk, sorry long?HELP GIRLS/GUYS?

So there is thi boy he is no hott,but he is not ugly either. he was going out with this girl for 1/2 the year but he was always realyl nice to me, they broke up a few months be4 school ended and she found another guy already, i alwayskinda liked him. then we sat next togther in music cl and he would always flirt with me and do the "nervous" test with me. then on the last day of school i said goodbye and he stood up and gave me a hug:) now idk if helieks me becuase he is an all around nice guys soo he kinda flirts with everyone and idk if he liek me or if ishould call him or what school starts again and we are on the same bus soo???help ways to flirt or give him the clue i like him?