How to convince my parents to let me go to warp tour!?

ive never been to a concert like this before, i reeeaaallyyy want to go.My friend invited me,he said he'll pay half of my ticket and drive me there and everything.Problem is her's 18,im 15,,,,my parents will not approve.Dont get me wrong hes a nice guy and everything.How can i convince them,they are really overprotective.its about a 3hour drive,,ill be getting home like around 1 maybe:O pleeaase how can i convince them