Most Helpful Guy
Imo he's interested, and yes he was flirting, but he is getting "cold feet" when it comes to actually asking you out.
Just about every guy has gone through this,
Not much you can do besides ask him out yourself or flirt back and wait for him to get the nerves to ask you out for real.
P.S. I have learned from talking to girls how bothersome and even annoying this can be, so guys, take the plunge and go for it!