It really, really sucks to have your image of who someone is -- or at least who you thought they could be -- proven false. I'm sorry. Sometimes you can care for someone very much but realize they're not in a healthy enough place for you to be in a relationship with them. Take care of yourself right now, you will be ok.
Me, 30ish bi female, been doing solo poly for roughly 5 years. Gia, Clay, and Pike, my partners. Davis, ex/friend/"it's complicated." Eric, Gia's husband. Bee, Gia and Eric's toddler.