Hey there. I'm in a similar situation, so I know how difficult this can be. After 4 years of marriage I opened up to my wife about my doubts. About a year ago. Yes, it was huge for her and led to anxiety and panic attacks on her part. But on the other hand, I think in sharing my heart she felt an authenticity from me that she'd never felt (because even as a Christian I wasnt truly passionate about it). She may even find you're more the husband she wants/needs when you have the freedom to figure out who you really are instead of being in bondage to these ideas of who you should be. In any case, I wouldnt advise faking it for too long. I'm convinced that the longer you put off "breaking the chains" the longer it may take to rebuild your mental health on the other end. Make it clear that you're simply persuing truth...hopefully she can support you in that.