Ben Affleck must be doing something right. He’s on the cover of Details magazine for the fourth time. (The issue hits newsstands Tuesday.) The Boston-bred actor/director talks a lot about his new movie, “Argo,” and opens up about some ancient history. Addressing the issue of his high-profile romance with Jennifer Lopez, he says he was branded as a “thoughtless dilettante, solipsistic consumer blahblahblah.” How did he finally extricate himself? “I just said, ‘I don’t want to do it anymore. This is horrible. I don’t want to be in this spotlight, this glare, in this way. It’s tawdry, it’s ugly, it’s oppressive, and it’s inane. So I’m going to try to get away.’ And most of the way I did that was by not acting. I said, ‘I’m going to steer myself toward directing.’ . . . People bring up 2003, and I get it. Jennifer Lopez, and ‘Gigli,’ and all this [stuff] just kind of blew up. But, you know, in 2003, Barack Obama was a state senator in Illinois! Okay?”