I know that feeling very well. But, it's the worst possible answer to your problems. You can try other things to turn your life around to a happier, more tolerable place. Some things will work while others won't. You can try to build new relationships with people, either in the church community or with a support group. Some may become friends while others may not be so nice. These things can be tried, retried, and tried with different methods. But, once you "check out", that's it. It's final. No take backs. No way to change your mind. I hope you'll try every other possible means to help yourself improve your life and, if you still want to leave, please talk to those who have either tried it or to people close to those who succeeded. It's more of a nightmare than anything else to everyone involved.