As a teenager - and it was a while ago! - i would never dream of confiding in my parents because I sensed they would not really understand - bearing in mind that they were from the 'war' generation, and had more important things to worry about at the corresponding time in their lives!
I was proved right on the one occasion they caught me crying (no notion of knocking on bedroom doors in our house!) over a girl, and I got the "This nothing compared with real life ..."b and plenty of mutual catching eyes, raising eyes, tutting, etc.
I have never forgotten it, and when my middle daughter was fifteen and cried in my arms over an unrquired crush, i remembered that for her, this is as bad as life gets because this is the first real emotional pain she has known, so I listened, and advised when asked, with no reference to my greater experience in these issues - who needs that?
I would not countenance total strops, flounces, or hysteria generally from my girls, but genuine tears, I was - and am - there for them with no message to give except love and support - that's what parents are for.
Teens don't need "When I was your age ... plenty more fish ... not worth it ..." twaddle, they need support and someone to understand while they figure it all out for themselves and learn from the experience.