Does he still like me?

we met at my best friend's birthday party, and we started talking a lot on myspace. when i see him at school he subtly looks at me but pretends not to. we have a cl together, and whenever we do group activities and he is in my group he looks really happy. then one day he just started talking to another girl and stopped commenting me. he was in one of my groups today for a cl activity, and he seemed really chill. one of my friends talked to him and he told my friend that he thinks im cool and really chill compared to other girls he knows. help!