Something flirty to say with my usually " heey[:"?

Flirting online is a tricky thing because sometimes its hard to tell from just text alone. If you're the kind of person who doesn't use smiley faces a lot then using a lot of smiley faces can seem flirty. You can also try to initiate conversations so that he knows you want to talk to him. Otherwise just hunker down and wait for the movie date.