Not sure ..

Why do you want to let it go and forget about her? Is she everything u wanted in a girl?
Why did you stop talking to her? was it a matter of out of mind out of sight, or you wanted to get rid of ehr so to speak?

Its good you recognize your mistakes. Im sure even though u didn’t “use” her in that sense, she must have felt a little bit hurt and wondering what hte heck happened.
BuT she is asking for your number, so it shows that she may still be interested…