Your two best choices are:
1. Do what Wilie suggests and make a clean break as soon as you have the opportunity and never look back. There is a whole wide world out there and you are young enough to completely start over and build a rich life of new friends, family and experiences. If your so-called friends would narc on you to the elders then they are worse than mine and probably aren't worth saving. Ditto on your family.
2. If you can't do the latter, then arrange a meeting with the elders and feign repentance. Do all you can regain everyone's trust by appearing to be an überJW while secretly devoting your life to destroying the organization from within. Once you become an elder or, even better, get a position at Bethel, you can use your position and influence to spy on the organization, sabotage their operation and corrupt weaker JWs away from their faith. Throw in a secret nightly satanic ritual (like reciting Lord's prayer backwards while burning a black candle) to stoke your passion for evil!