I find it interesting that on The Bachelor/ette, it's quite rare for any of the women (or, on The Bachelorette. the men) to say "Meh, I'm not into you". Maybe they just don't show it, but it seems like all of the women want to stay. And the bachelor usually finds it difficult to send the women home. It's a highly artificial situation, and the women may be confusing their competitive drive to "win" for an interest specific to the man, but it does seem like a large percentage of pairings, in the right situation, can become infatuated.
The brain must have some way to make high level valuations influence the altimate emotion-circuit 'click' into infatuation. Otherwise you would just become infatuated just by randomly sitting next to someone matching 'physically' (that obviously also happens but is less frequent and probably caused by a correspondingly stronger physical component).
So whatever the pathway is leading from high level to low level it needs learned patterns like "is smart", "can provide", "controls the show", "makes nice compliments", An...
This is the earlier promised post about Dealing with a Major Personal Crisis. Please continue reading there but comment here.
The reasons for posting it this way are explained at the end of the link. I hope this approach does what I want it to.