I think the key line is "Oh, she's not the best, but she's all that I know". It shows the perspective -- this woman is what he knows, so regardless of what she actually is, she has set a standard for him. That's why he looks for her in other women, why he keeps going back. It doesn't matter what qualities she possesses or doesn't, it's the power struggle, it's the forbidden fruit. It's everything this woman represents that he can't stay away from. That kind of passion can make a person think they're in love, when really he just wants control, and that's the one thing he can never keep in his relationship with her. Those kind of relationships can go on forever and ever.
I think the key line is "Oh, she's not the best, but she's all that I know". It shows the perspective -- this woman is what he knows, so regardless of what she actually is, she has set a standard for him. That's why he looks for her in other women, why he keeps going back. It doesn't matter what qualities she possesses or doesn't, it's the power struggle, it's the forbidden fruit. It's everything this woman represents that he can't stay away from. That kind of passion can make a person think they're in love, when really he just wants control, and that's the one thing he can never keep in his relationship with her. Those kind of relationships can go on forever and ever.