Is love an emotion or behavior?

Love waxes and wanes in relationships. You don't LOVE the person you are with every day, let alone be able to stand them every day.

This statement was made in another thread, and while it's certainly possible that the author meant it in a different way than I take it, to me it embodies all that is wrong about our society's concept of love. Is love merely an emotion, like anger or happiness or jealosy, that you feel sometimes but don't at others? To me this understanding of love is why so many marriages fail. It seems very selfish to me. It's like, as long as I'm feeling love and am therefore getting what I want out of the relationship (happiness), then I'll stick around. But as soon as that feeling goes away, then I've "fallen out of love" and I'm done with the relationship.

In my opinion, however judgemental it may be, a person who thinks like this never loved their partner to begin with. What they really loved was the satisfaction they personally got out of the relationship.

My opinion is that love is not a feeling; rather it is a pattern of behavior that I exhibit toward my partner. If I love them, then I give them my trust. That's a love behavior. If I love them, I always seek what is best for them. That's a love behavior. I encourage them, I am kind to them, I communicate with them, I am faithful to them, I share my life with them... All these things and more are my behavior toward the person that I love and have committed myself to.

And because it's a behavior, not a feeling, I can do these things even when I don't particularly like them at that moment. She put a scratch on my new car? Furious? Maybe. But I can still be kind, and that is the behavior of loving someone.

And no, I'm not saying that emotion isn't involved in the process of coming to love someone, I'm just saying that it doesn't define it.
Ok, I'll stop driving my point into the ground. Agree or disagree?