Joseph Gordon-Levitt.

“The (500) Days of Summer attitude of “He wants you so bad” seems attractive to some women and men, especially younger ones, but I would encourage anyone who has a crush on my character to watch it again and examine how selfish he is. He develops a mildly delusional obsession over a girl onto whom he projects all these fantasies. He thinks she’ll give his life meaning because he doesn’t care about much else going on in his life. A lot of boys and girls think their lives will have meaning if they find a partner who wants nothing else in life but them. That’s not healthy. That’s falling in love with the idea of a person, not the actual person.”