My mother is sure that the reason all 5 of her children are not JW's is because of our ass step dad. I had to tell her, "I just grew up."
Sometimes doing the right thing is not always the easiest thing to do. I'm positive if you can get your father back out of the "truth" both of your relationships will be even stronger.
The biggest misconception, and this is the fault of churches, is that religion and spirituality are the same thing. Regardless of what religion you choose you'll, at least in part, be following the will of men. It is up to you as to whether you can accept their teachings or not. Some would have you believe that your choice is made for you but it is not.
Dear Lord, please save me from your followers.