The Protein Called Love

I've been thinking about this a lot recently.  What are feelings?  Can feelings become obsolete?

I know, we're launching into the realm of metaphysical esoterica, but consider it for a moment.  

There is a theory that love is merely an illusionary state, created by an increase in certain proteins in the body, in order to encourage the procreation of the species.  It's like your body creates a mental trance with these proteins so that you won't listen to logic and reason - at least not until the propagation is done.  Then the proteins decrease, and it's "see you in the divorce court".

Given that hypothesis, wouldn't it then be fair to say that if physical contact is no longer necessary for procreation - well, isn't then love obsolete?

Of course, saying love is obsolete would suggest that "love" even existed in the first place,  when in truth what we've been talking about when we say "love" is actually a protein.  So to be precise: the protein called love, that's what's obsolete.