Yes, I think that's really the only place where we disagree. And for the record I am OK with that, and just responding as an intellectual exercise, not because I think you are wrong for using that definition.

First off, the argument that I can't say "I love you" without it immediately obligating me to start working towards a long term commitment (LTC), and instead having to say "You are so rad" feels a whole lot like the last argument people used against marriage equality: "but why do you have to call it marriage. I am happy that you found someone but marriage is between a man and a woman, has always been that way, and should remain that way, otherwise we are messing with society's understanding of marriage, and that's dangerous." Not saying that this is what you are saying, it just has the same feel to it. If I love someone, I tell them so. I don't think they are rad. I think I am in love. They are different things.

Second, if we are looking at these terms as constructs, with the ability to define what they are, I would argue that simpler is better. Love is love. Commitment is commitment. Isn't it better to communicate them as separate things, than have the ambiguity of implying them together? Love is a feeling. Commitment is an choice and a set of actions. Why does a feeling imply action? No other feeling really does: "I dislike you" doesn't mean "now we must fight", and "I think you are funny" doesn't imply "we must start telling jokes". So why is love special in this way?

Third, the practical problems of telling someone "I love you" a week into that relationship. Yes, in a vacuum that can be a supremely bad idea. But as someone with some experience with this, I can tell you that practically, it's less of a problem than it would seem. Typically, I will be very upfront about my non-traditional view of relationships and people usually self-select pretty quickly to be the kind that understands them. Also the term casual love specifically is pretty well known in my circles, or I simply explain it as I did here, providing the original post about it. I never had an issue with someone mistaking it for "... and I want to be together forever", nor have I heard of it being mistaken that way. So I would argue it's a non-issue.

And fourth, love is a feeling an individual experiences. If you love someone, ok great good for you. Why should that compel you to do anything about it. Like, you suddenly and inexplicably fall in love with someone who isn't your spouse. Are you now obligated to get a divorce and try to pursue this new person? Just because you developed a feeling? Love shouldn't imply expectation. I guess you could argue that if you are in a committed monogamous relationship you could never fall in love with someone else, but let's face it, being committed to person A has rarely prevented someone from developing feelings for person B. Or is the idea that you can develop feelings, it's just not love, because you are in an LTC? Or you can't call it that? That to me that brings it back to the talking heads on TV saying "well where does it end? Today you feel love for your neighbor, and tomorrow the society crumbles?" Again, I think we are all big boys and girls and know when we feel in love, why not call it what it is?

So in conclusion, in my mind better communication wins. "I love you" vs "I love you and want to form an LTC" are different things, and rolling them into just "I love you" is what puts all the expectations on someone.