Does he like me or just a best friend kind way?

how u know if a guy likes u bc this guy and i were sitting on the bus together and i was i guess flirting ididn'tt now it but my bff told me the next day ididn'ttrealizee he was flirting back bc my bffnoticee he wasrespondingg to myflirtingg . (by the way this wasWednesdayy and this was a feildtrip also hes my teachers son and does not go to my school and he came in bc it was feildtrip and he was spring break and hisBrothere rgoes to the school too) next he took out his phone and went to his contacts and said do u have a cell and said yes gave him my number. he called me so icouldd have his number and i thought since this was mydefaultt ringBoyfriendd saying will u be my boyfriend and stuff and i said or well loudly no! and then he looked at me like what? and i said nothing i thought my phone was off. nvm and we played checkers on his ipod and he spelled his name wrong instead of kat it was kay sooo cute! We sat together at the play which was theFieldd trip. we talked a little commting during the play hismomm aka my teacher was a few rows above us and i think she saw us flirting. The next day i had off and i called him with my bffl and he did not pick up voice mail. But 3 secs later he called by saying hecouldn'tt get on the phone in time. we talked for 20 min and during this convo hesaidd do u have a face book an di said i used to an he said awwwwwwwwwwwwww.......