No it's boredom mixed with an easy target. She just rubs me the wrong way with her way of presenting herself.
I admit I didn't read every thread in this post. I am not giving you advice because I don't care what you do...it does not affect me either way.
I do wonder if you asked friends and family in some way and they told you to dump him. You don't want to, so maybe you came here for more information so you don't have to take advice that others gave. You may learn how some types of sociopaths think about the world and that may prove interesting, but the truth is, you just might learn something interesting and what those tidbits may be will occur to you after you are out of this situation.
I don't see this working out in any way. You feel things in a way he doesn't/cannot/won't. You have more invested in this.
So, only you can figure out how much more you are willing to lose over it. You may gain insight and knowledge and that stuff may prove useful in some future scenario. Is that worth it to you? Is that what you are seeking?
Otherwise, start getting ready to say goodbye. You are under zero obligation to make him feel powerful, particularly when you make yourself weak in the process. Unless, you like that feeling for yourself. Then you don't need advice. Just keep on doing what you want, but maybe learn more about yourself. In fact, do that anyway. Focus on you. What do you want? (And your answer should not include keeping him in your life or keeping him interested. This question is for you only. Right now, it is only about you. Who do want you to be right now and what makes that a reality for you, alone.)