No, I think there is more to it than that.
There is something special going on inside our bodies. I don’t know if we ever will quite understand what it is. No doubt there are all kinds of complicated chemical reactions and interactions going on inside our brains and bodies, but, in addition to that chemical/mechanical level of our selves, there is a layer of consciousness that floats on top.
Love/romance/sexual attraction cannot exist without the chemical level, but this is just the foundation for the consciousness level.
I believe we become smitten with someone due to experiences we had as our consciousness was forming (when we were young). That person of our desire has a very high resemblance to an image we carry of our perfect mate/sexual partner.
When we see that person of desire, our internal attraction detector goes into overload. Love is inexplicable.