I think that this person is stalking somebody that used to be friends with them, or who the saw on TV or heard on the radio, or perhaps they were even in a relationship. Obviously, the stalked doesn't like it, "blacken my eyes," so that he can't peep and look at her anymore. "cut my lips off," so that he can't send her threats or taunt her. Even if she did these things, he'll still be at it, because, "I'm a student of obsession."
I think that this person is stalking somebody that used to be friends with them, or who the saw on TV or heard on the radio, or perhaps they were even in a relationship. Obviously, the stalked doesn't like it, "blacken my eyes," so that he can't peep and look at her anymore. "cut my lips off," so that he can't send her threats or taunt her. Even if she did these things, he'll still be at it, because, "I'm a student of obsession."