I wonder why my extroverted NT cousin can't keep the same girlfriend for very long. She dates a girl, all the family grow familiar with her (because my cousin picks lovely types), then all of a sudden my cousin finds she can't commit and then dumps her. It's been the same pattern for the past 10 years. And she's no way anywhere near ND.
So goes to show that not all NTs can cope in relationships. My cousin can't seem to. That, or she's very fussy and nitpicky and can't deal with any faults or quirks a girlfriend might have.
But I know that no human is perfect and that anybody you meet will have some quirks or faults. If their quirks or faults are within the normal range (ie, not abusive or anything) then sometimes you just have to accept them in order to be able to maintain a healthy relationship. My partner smokes like a chimney, can be moody, lazy, unimaginative, lacks a sex drive, lacks money, and gets himself too drunk sometimes, but it's still a healthy relationship and we become soulmates, because I still love him.
My faults are hoarding clutter, being disorganised, hyperactive, impulsive, sensitive, and have emotional problems such as Emetophobia, Agoraphobia and Misophonia. He accepts this as the way I am, and says I'm still a loving, caring, honest person and the "right" person to have a relationship with.