I looked up the book and it is definitely next on my to read list.
And again you bring up an interesting point. I don't think that the examples you brought up are extreme. They do exist on daily basis and sadly we do accept, rationalize, and make excuses for them, and always in the name of love. But worse at the expense of love.
We are but a collection of experiences and scars that shape us like a stained glass piece, and the end result can either be beautiful or it can be hideous. And those experiences also shape and form how we interact in general, and how we love in specific. They way we love as teenagers, is different that in our twenties, or our thirties. We some times mature in the way we define and express love, and other times our definition and expressions are mutilated and tainted by our experiences.