OP
Remember - young women (though this can apply to women of any age really, but it depends on their emotional maturity) ...where was I? Oh, yes; young women like having attention, being noticed and pursued, even if they are not serious about doing anything further. It reaffirms their self esteem as desirable and therefore worthy as an individual. Particularly as they (like you) are just beginning to find their place in the world as a young adult.
Most of the time, they don't know what they want... but they want it anyway! This makes life very confusing for inexperienced young males like yourself, who get mixed signals and the 'come-on' but don't yet have the wisdom to spot a pricktease when they see one and act accordingly.
You'll find as you get older that very little changes

but with time you do get to notice the patterns of behaviour that are a dead give away for an encounter to avoid overly emotional entanglements with.
When all is said and done, the two of you were not a couple, just holiday acquaintances who kept in touch. Keep those raging teenage hormones in check, lad!
Whilst on principal I agree with the following statement:
"There are plenty more fish in the sea..." I must make the following addendum:
"But the deeper you go, the uglier they get."
Relax, young fella, there is plenty of time to get
really bent out of shape by a woman who means a great deal more to you than a mere holiday non event.
