My heart aches for you, friend. If you get divorced, I hope you're at least able to let yourself have sex without being married. I don't mean to badmouth your parents or your church, but these people don't sound much like family and friends. I do understand how scary it would be to completely walk away from your life.
But as someone who lived for my abusive, controlling parents for years, I will warn you, you'll continue to become angrier and more resentful. It isn't fair for you to have to hide your authentic self. I wish I hadn't waited so long to walk away. They may truly believe what they're doing is best for your eternal soul, but it's control and it's not healthy.
I'm not trying to be a bitch, I just want to give you permission to live your life in a way that's best for YOU.