she's a HB8 ? She probably wants some social proof(see you with hot chicks)
Well you did a good thing by acting cool, when I was younger(16,17) I would tell them to go f*** them self it was not so good, but yeah I was just a kid back then so no harm

. Last week a girl canceled on me cause she had to go with her mom , so I told her yeah It's cool, We'll see each an other time

. That day I went with some friends shopping , so actually we did had a great time, later that day I was on msn with her. Ain't she was asking me how my day went, I told her : I'm so tired. She said: ooh, what did you do today?
I told her that I went shopping with friends and that I was fun etc...
She was like superbumbed out man, and now she always try to see me, but yeah I'm busy with school etc so I'm not giving her much time and attention and I'm working on other girls.
You should let some time pass, work on couple of other girls. Get lots of pics with hot girls/women.And let her chase you, if she don't, then she wasn't worth it