Romantic love is a form of love that is often regarded as different from mere needs driven by sexual desire, or lust. Romantic love generally involves a mix of emotional and sexual desire, as opposed to Platonic love. There is often, initially, more emphasis on the emotions than on physical pleasure.Properties of romantic love purported by Western culture include these:

It must take you by surprise (be the result of a random encounter).
It cannot be easily controlled.
It is not overtly (initially at least) predicated on a desire for sex as a physical act.
If requited, it may be the basis for lifelong commitment.