If what they say is "Nothing is forever," then what makes love the exception?

indeed Love is forever
it steps out of the box of ideas and beliefs
and constraints 
and is the purist emotional release from your
heart and soul you can experience
Love comes from love. Personal love 
comes from unconditional love,
which is the essence of love, of life

Maybe genetic coding - maybe there is a gene that determines compassion and love. So if some one had that gene it could be passed on for ever. Cheers!

Without reinforcement, even love would fall in that category. You may not agree straightaway, but think hard about it.