Depends on where you live. Each state has an age of consent. If you are still considered a minor where you live, you would need parental consent, and crossing state lines in order to get married without consent could be considered kidnapping (if one person is older than the age of consent and the other is younger than that.)
Check local laws to be sure what the age of consent is. But why such a rush to get married?
As much as I don't believe in getting married so young. I think you should check the marriage laws in certain states. However, I'm pretty sure it's kinda hard to find a state that does that. Who am I to stop young love?