@robx: If you accept him as is which is what unconditional love might mean, wouldn't partaking in a sick relationship with him be part of that because you would be loving him unconditionally?
That is a dastardly bit of logic-twisting. I think what my esteemed colleague is saying is that she will love Monsoor in spite of Monsoor's Shmedlaply Ways -- his Ways will not make her feel "not-love" for him.
But that doesn't mean she can't impose conditions on actively loving (i.e., coupling) with him.
Unconditional love in my reading means you will love that person for themselves, regardless of what they do. In that sense I do have unconditional love for WAW. Her nuttiness is not making feel not-love for her.
But that doesn't mean, as @hoosiermama points out, that you are a doormat and don't have boundaries.
WAW's nuttiness is, however, making feel not-like and not-want for her. I love WAW in spite of herself. But I also love myself enough not to hitch my carriage to the crazy train.