"...I could live my life doing what I love and possibly be killed at armeggedon."
BlackWolf, If you don't believe in God or the Bible then why should you fear Armageddon? It's not going to happen.
It sounds like you need to express yourself desperately but your parents and sisters are not people you can talk to. Tell your parents to get you a doctor. That will make them believe that you are just going through a phase and hopefully not apostate.