Get an after-school job. The time away from home will give you space and independence from your parents. Also, earning your own money will allow you to avoid asking your parents for theirs. Just make sure your job doesn't conflict with school, homework, or sleep.
Participate in extra-curricular activities. Join a sports team that appeals to you. Get involved in school clubs. Volunteer in your community. You'll not only get space from your parents, you'll also build confidence and collect bonus points for college applications.