When I first experienced what I thought to be "love" I decided to do a lot of research on the neuroscience behind it to help understand it, because I too didn't really know what it was....take what I say with a grain of salt, I just am offering how I look at things, which is more scientific in nature, and that's one way of doing so. Interestingly enough there does seem to be evidence for there being a differentiation in the brain between sexual lust and love, though the two regions are closely intertwined. There does seem to be enough fMRI evidence though for "love", as well as different stages of love, for example passionate love is at the beginning and then more long term close bonding, with reduced passion but increased security. (I'm kind of paraphrasing on the research here but if anyone is interested enough I could pull up my old links to show that I'm not just making stuff up haha). Oxytocin and dopamine are the major neurotransmitters responsible, it seems.
To a certain degree I do think love is a fairytale, and that it's really just a big mush of brain chemicals....it's comparable to a brain on drugs like cocaine, and I think it must be very powerful and addictive to love someone and have them love you back, no wonder our race has always been obsessed with it. But people find poetry in everything so I guess "love" is the romanticized version of a bunch of chemicals rolling around our heads....I guess it depends on how you think about it, but sometimes I do truly believe I'm far to analytical to ever fall truly in love. So maybe it's subjective, it's true if you believe in the fairytale but isn't if you don't. Ignorance is bliss.