Take it as a compliment! It just means you're young and attractive, you'll be wishing for that attention in 20 years.
If someone doesn't want compliments, don't you think you should stop?
You're not attractive if you don't like compliments.
It isn't right to continue complimenting a woman after they've asked you to stop, because then it becomes sexual harassment. Women don't wat to be made to feel uncomfortable, and this kind of behavior does that.