I don't think its a waste of time. Your idea or definition about love changes in different age. I think the love of teenage tends to be pure.

 This is so dumb. Some teens aren't as stupid or gulibal as the sterotypes make us out to be. The one's mature enough, are just as mentally capable as adults. Yet, some adults still go for the ignorant path, and say ALL teens. I say, teens can love just as much as the next adult. We are, breathing, feeling, and brain powered beings. We know feelings, like sadness, angst, hubris, and so on. So in that, our love, is just as futile as yours.

 I don't believe love or relationships are futile for teens. I think of these as good experience for learning how to cope with a real adult relationship later. However, If by intimate you mean sexual then I would have to say Most teens are not ready for that .. Sex complicates things even for mature adults. When It comes to sex keep this in mind if you are a teen : Girls play at sex to get love ; Boys play at Love to get sex..
A thought to ponder.

 I think it is true for the gullible teens ho always fall in love. But the others are smart they take finish school and take care of their love one.

 Not all teenagers that have love relationships are sexually active or intimate. I am 16 and I have dealt with hardships past my years....unfortunately so have many of my friends. However, those complications have made us grow up faster then we would have liked. So to say that ALL teenagers do not deserve a stable shoulder to cry on or unload the days problems on like many married couples do would deprive may teenagers of there only stability in life.

School is not the safe haven it used to be when my parents were in school. Gangs line the wall near the lockers, a camera cell phone is in the pocket of more then half the school's pockets accessible to video tape your embarrassing mishaps and the pressure to do well in school academic wise is always present, and not to mention the all to easy access to drugs.
Not to mention the problems at home. I have heard all to often of marriages crumbling, parents making their children choose between the two parents, or of death in the family.

Destractions from school work are always present and should not be pin pointed to having a relationship.

To generalize in this type of topic often is not wise.

 While I might agree that it is futile to hope to find someone to stay with for the rest of your life when you are a young teen, dating helps people develop and it gives them experience in dealing with situations that they may not have been in otherwise.