Yeah I’m going to call a spade a spade and say your mother is in a cult. This Trancey Man vilifying you is giving cult vibes. That is what cults do: they prey on vulnerable people–like those going through medical issues, personal conflicts, divorces, mental health crises, etc–, and then drive a wedge between members and their support systems to get them further sucked in and dependent on the cult. I would bet my last bag of Sleepytime Tea (fun fact: also made by a cult!) that Trancey Man has the one and only magical solution to your “dirty impurity” if you asked. You don’t mention your dad’s role in this, but it sounds like he is tolerating or enabling this lunacy at the very least.

I’m sorry that this is happening to you and that you’re paying the price for what your mom has done. But I think that not only can nothing good come from introducing your boyfriend to your parents, but you might need to go No Contact or Minimal Contact for a while, if that is feasible. You mention that you’re in college–are you living on campus? If you’re living at home, I would seriously recommend seeing if you can crash with a friend for a while. Get your school’s counselling centre or student services involved if need be. You are being abused, and you need to get out of this situation yesterday.