[Quote:]" How can i tell if his faith has waivered? should I ask him strait out or leave him to make his own decision?"
Im 17 and I am no longer a christian because of my parents. Take it from me dont pressure him let him live his life if he's meant to be a christian he will find his way back to God.
Don't put the full blame on your parents. Yes, they may have an influence on you and your decision but the final choice is yours. You are the one that is ultimately responsible for your decisions and the route that you take.