Usually you don't want to respond to her if she takes more than 12hrs to get back to you. If its a good conversation just shoot her a text the next morning or something.
I usually vary the time between the texts I send. I like keeping her on her feet and constantly checking her phone. For instance I may be texting back and forth then all of a sudden I don't text her back for a few hours or until the next day.
What you can do is take the time it takes her to reply to you and half that giving you the time you wait to reply. This usually works out in cases where the two of you aren't able to talk that much.
I'd try sending a few texts back and forth and set up a meet up or just go for the meet up by saying something like:
you: Hey [nickname] do you like fun, great conversation, and drinks?
HB: blah blah
you: X(day of week) is Y(event you want to do) come with me
ex. Monday is sushi night come with me..just don't forget your chopsticks!
