What is love?

I've enjoyed the film, "Paper Heart"   regarding the subject of love -- finding it, falling into it, being in it, staying in it, going after it, missing it and really knowing it's the real thing. It is a subject that has left me entirely nonplussed  and begging the question of what is the true, real kind? And do I really believe in it or am I just conditioned socially to think it really exists? By the many interviewed in this film, it sounds like many do.