I'd say it TOTALLY depends on the personality of the person in question.
My boyfriend is mono to me.
But, he NEVER demands my time, ALWAYS respects the importance of my commitment to my husband, my kids, my siblings, parents etc.
that often means he gets so little time with me as to be negligable.
In fact, it's so rare that we ever go on a "date" that is just the two of us together that I can count them and remember each one in 10 years.
So-it REALLY depends on the person.
Sometimes I wish Maca's gf didn't have such a busy family life-because it makes it so hard to spend any time with her-even WITH the family around.