Fly,
I left when I was 19, not much younger than you. In the 19 years since I did that, I built a fabulous life for myself. I went to college right away (before burdening myself with a "comfortable" lifestyle). I developed my career as a high school teacher, and then eventually went to law school. Now I'm a lawyer. I built relationships with people who are my family, now, and I am closer to them than I was my own JW family members. Now that you really know that in 20 years, you, this world, your family and everything else will essentially still be here, "in this system," there is no reason not to plan for it.
Keeping busy with work and school will help you to keep your mind off of everything you think you are leaving. You will make new friends and, if necessary, make your own family. Now that you know they aren't right, it is so hard to pretend.
And get help-stay here, talk to a counselor, and know that they can't be right. It really is impossible for them to be right.
Love to friend,
Shoshana