If a girl asked me for my number and I gave it to her , what does it mean?And when is she going to call?

mwlegra
I was walking past a beautiful girl...Giving her this mysterious look.When I went to my car in the parking lot, Her friend came up to me and ask me if I could give her(the girl a shared a glance with)...I said okay, and gave her the number...later on the beautiful girl( with whom I exchanged a glance) came to us, but I was kinda in a haste so went to the car to go home,after I said goodbye...hahaha...She has not called yet(it is has been one and a half day)...What must You expect what should I do?
If a girl asked me for my number and I gave it to her , what does it mean?And when is she going to call?
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