It's so sad to think of someone being stuck with an emotionally manipulative partner because they can't handle being alone. I mean, would you stay with her for the rest of your life in order to never be alone, or would you go behind her back to seek another potential romantic partner who you could dump her for with no time gap in between?
Learning to make it alone can impart immeasurable benefits in terms of self-confidence and self-knowledge. Do you have any close friends with whom you could stay, who would be willing to give you extra support if you left this woman? I know that's a lot to consider asking of a friend, I'm just trying to brainstorm solutions...
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.