No longer give that person any access to me. Forgive, and move on because it has nothing to do with me. It’s not betrayal if you didn’t love this person, it’s almost always the case which complicates things. Therapy, and figuring out where I missed the signs that they were not trustworthy. Owning my part and choosing healthier people. Lastly, I let God deal with them. If they can betray someone they have issues way beyond my comprehension.