Her respect for you is the single most important thing in a relationship
The most important thing you must maintain at any cost in a relationship is her respect for you. The moment she stops respecting you, she will also stop being physically intimate with you. Without physical intimacy, a relationship cannot survive, and on top of that she will eventually lose her feelings for you. It is established that women fall in love during physical union, because sex triggers the release of oxytocin. So for her to keep loving you, regular physical intimacy is necessary, and that is impossible without her respect.
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