Let's think of other examples of memes: language (and possibly therefore thought?), compassion, hate, friendship, evil, good, passionate kisses, music, reality... The company of memes is not bad company to keep.

What is inherent in a human?

Ah good point, novalis. Romantic love is definitely a meme. I suppose that the question of 'real' love's memeness depends on your beliefs on the nature of thought, and perhaps also on spirituality. Supreme cynics will say that love is simply a promotion of a good thing happening to the organism, just like any other thing the organism experiences. Supremely gullible people will say that love is what makes the world go 'round. IMHO, it's somewhere in between.