When I was 14, I was devastated when one of my girlfriends decided to distance herself from me. The same situation probably wouldn't cause major mood swing now, if there's any mood swing at all. I wouldn't say it's an improvement though. Just an example of how people evolve and shift the focus in life.
My dad told me a person needs to have the ability to enjoy the best things in life and also swallow the sorrow at the same time.