What to do next?

So I talked to her after class, got her number, we chatted a few times (but it was mostly about college work). She was pretty cool and seemed to be laughing at my jokes and stuff, gave her number in the first meeting.
Anyways last Thursday after class I asked her if she wanted to hang out coz I was totally free (idk if that was the right line lol) she had some friends waiting so she said she had to go.

So what now?
Should I play the push and pull game and not talk to her for a while or something or what?