again

I am about to break a heart. The heart of my best friend. For the probably first time I realize the difference between loving and being in love. I love him. But he is in love with me. I would never condemn him for being with other women. He would freak out seeing me with another man. Is the difference between loving and being in love only the pursuit of owning somebody? And if so, what is then good about being in love?
Makes me believe that human brains are really of faulty design...