You don't run away.
You call a Teen Crisis Line, Teen Help Line, Child Crisis Line, or whatever it is called in your area.
If you run away, there will come a time where you will be scared and alone. You will need help, and won't know to whom to turn. Some stranger or strangers will offer to help you. But, some won't care about you. They will want to take advantage of you, maybe even hurt you. You won't be able to tell the difference between those who genuinely care about a runaway kid and those who would use you to their benefit.
Avoid that. Call the crisis line now.