how do i tell my dad i dont want to b a christian anymore n i want 2 explore new things?

[Daniel]

my dad thinks being a christian will save me 4m doing bad things but my gf doesn't believe in god n she hasn't got in2 2 much trouble shes a great person sooo loving n caring but my dad doesn't see tht all he see is the drugs she did n the laws she broke im sick of him nagging on her n he thinks shes going 2 kill him n his wife witch anit tru at all she is a Buddhist n im thinking of being 1 2 but how do i tell me dad i dont want 2 b a christian