Love will never be the equivalent of sex. We all know many people out there have sex and yet do not love each other. Love is just an ingredient, per se.
For others, love comes in many degrees, and this is all very arguable, but I don't think it can be proven that love could ever amount to sex. For example, the Greeks believed Eros was the god of love and sex. Love and sex isn't like vim and vigor; love is more complex, and sex is done everyday, some of the time because people just want to mess around, not for love.