Oh I already thought they were in high school, the dramatic "my best friend is dating the girl I like and they're doing mushy stuff" practically gave it away. Any person who is older and wiser would not flaunt their affections for each other so comically (but I have been mistakened before ).
You're entitled to your opinion, and you make a good point, girls and guys fall for each other all the time without thinking things over in high school and such. Even though I'm merely 21, I see such impulsiveness and lack of proper judgement to be rather foolish, but that is my own opinion. It puzzles me how people can be so bold and daring without first assessing the pros and cons. I will agree with you that mushy gushy stuff is fine, as long as it is properly mantained and controlled. The key to a successful relationships is intimacy, passion, and commitment. I tend to think of intimacy and commitment as the most important, passion is secondary, because when passion dies, you'll have intimacy and commitment to fall back on, aka companionate love. But in high school, commitment is little more than a joke, the real thing that is going on is passion primarily and intimacy secondarily. It is no wonder why high school relationships often fail.