the line "i will feed the lives you live" means he is faking it and the Lines "i will suck you dry again" and the line "you are such a pretty mess" "i will take you down again" is talking about how his GF breaks up with him a number of times. And he tries to get vengeance by going back out with her and making her love him and then he breaks up with her...Trying to make her feel how he did...but he doesn't care how she feels because she made him feel like that so many times.
the line "i will feed the lives you live" means he is faking it and the Lines "i will suck you dry again" and the line "you are such a pretty mess" "i will take you down again" is talking about how his GF breaks up with him a number of times. And he tries to get vengeance by going back out with her and making her love him and then he breaks up with her...Trying to make her feel how he did...but he doesn't care how she feels because she made him feel like that so many times.