On the last bit, maybe I just haven't had the right kind of relationships yet, but aren't *all* relationships based on one controlling the other, or swapping up for the driver's seat at times? In monogamy, it tends to be the whole "If you sleep with anyone else, I will leave you!" that I know so well. With someone else, it might be "if you can't get/keep a job, I'll leave you!" Any number of factors, but all leading to the same end of path. Do what I say, or I'm gone.
No, that is not healthy. Long term relationships take a lot of negotiation and compromise and unconditional love. Hanging that threat over someone's head is manipulative and ... immature.
Love withers under constraint; its very essence is liberty. It is compatible neither with envy, jealousy or fear. It is there most pure, perfect and unlimited when its votaries live in confidence, equality and unreserve. -- Shelley
Mags (poly, F, 61) loving miss pixi (poly, F, 39) since January 2009, living together since 2013
"Master," (mono, 34), miss pixi's Dom for 3 years