I vote for ghosting.

You're not going to get any closure from a confrontation. What makes you think she'll tell you the truth now.

Back up and evidence. Pack up your stuff, and leave. Tell your family and close friends what happened and that you don't want any contact from her unless absolutely necessary.

The person you loved doesn't exist, maybe never existed. Sorry, I know it's harsh, but I feel you may end up regretting dignifying her actions with a confrontation . Let her wonder and be in the dark and in pain.

Good luck. I'm also struggling with the feelings you have of trusting another partner. I've only been able to have short flings since my last big breakup. But I'm feeling loads better. And the things I regret most are the actions I took which were self sacrificing to try to save the relationship or get some kind of acknowledgement of the damage done by my ex.