This is about a guy deciding that a fake life with a woman is leading him nowhere and he wants to cut it off. Despite the fact that he seems popular being with this woman and she wants him, he is drinking, they fight, and all of his friends are fake. It is a song about not selling out for the high life.
There are some drug references in this song, such as "Eating breakfast on a mirror," which implies doing cocaine after waking up. The controlling girlfriend doesn't want the singer to do them, and he resists.
More lyric interpretation: "The amount of pills I'm taking, counteracts the booze I'm drinking, And this vanity I'm breaking lets me live my life like this" - He's doing many things at once. The "vanity" could have a double meaning, literally it's a piece of furniture but it could also indicate how self-absorbed he is. "And you can cry all you want to, I don't care how much." - He doesn't care how much she cries and begs him to stop using drugs, he won't stop so she might as well give up.
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