Most Helpful Guy
he's acting friendly... so don't embarrass yourself by telling him about your feelings.
Most Helpful Girl
try being friends first because as a guy him admitting that he thought of you and checked up on you is a big deal. guys I know either be friends or exes, never do that. not yet at least. be friends and let him make the first move. if he does well and good, if he doesn't then just be friends. see what happens if he gives you lots of mixed signals and doesn't say anything about getting back together then maybe you take the initiative