I manage to "have fun with my youth" and hold a very serious relationship with my girlfriend. If these two forces ever met though, my brain would explode.
Then you're fortunate. My point was that there's no reason to put yourself through misery because of a relationship when you're 17. You've got an entire lifetime ahead of you which will no doubt be riddled with crippling, relationship-based depression and self-inflicted misery! Why go through that when you're a teen? Save that for later, have fun now.