that will come with growing up.
once you're finished with school and can live on your own, what you do isn't anyone else's business.
it's easy to think about running away as this idealistic thing, and romantacize the idea of living off of nothing and sleeping in cars and stuff but really it's not all that. it's hard, and it's miserable, and while the experiences may be "new," they won't really help you become a better person. if you run away miserable, you'll be dragged back even worse and then what?
just wait a few years. get through school. maybe get a job or something. once you're actually grown up nobody will be able to hold you down