I am a long time fan of you, my first girlfriend was a histrionic, she cheated on me eventually

but i am not even mad anymore, i learned a lot from her.
I believe i have slight narcissistic tendencies, (that i am actively trying to overcome)
and perhaps that is why i practically only fall in love with histrionics, that is very weird.
Every time i feel a girl won my heart i sense she has histrionic characteristics.
But my main topic what i want to talk about is, what i have learned from being around histrionics and their troubles.
For me it seems you seem to be overly attached to the other person, and that causes boredom until you cant take it anymore. And that is why all of the playing of the power games and other tricks.
Because you put all your energy into the relationship, that can be negative thing.
Of course power games can also come from trust issues, it can feel like if you control the other person then, they cant leave you. But that is exhausting to the other person so this strategy is meant to fail.
Other thing is you should have hobbies, friends, so you can channel your excessive energy out of relationship. You partner is not your constant entertainment, they probably need to work and do all kinds of $#%^. If you feel like your are getting bored, go traveling, learn cooking, do yoga whatever, there are more things to do in life. Learning to manage boredom is a skill, that has to be developed.
Love and relationships should be in my opinion as easy as possible, because the main goal of the relationship is not to compete, but support.
So picking the partner is quite difficult process because, we cant have this balance with everyone.
So do the testing, if the partner is correct, before relationship, as friends, so when it wont work you split like friends. But when you are friends, tone down the flirting, so the other person wont try to progress to fast.
Hope this insight has something useful.