To me, I believe she's singing about a relationship with a girl she's known, probably a friend. The singer never thought of herself as a lesbian and is confused as to why she keeps thinking about the girl who also probably isn't out as gay. The relationship probably started at a bar one night when the singer was drunk, hence "It's a little blurry how the whole thing started" and "Poured it down, so I poured it down." They end up going to a hotel and the singer is too drunk to care. However, the other girl is really interested in the singer ("You were talking deep like it was mad love to you"), but the singer is not really interested in a relationship ("You wanted my heart but I just liked your tattoos"). Either way, the girls have a fling with the singer just passing it off as an experiment, and when they wake up in the morning, the singer doesn't want any type of relationship, though the other girl does. The next verse goes into explaining that the other girl feels hurt by the singer's rejection, but the singer claims the other girl didn't love her anyway. (*Note: The true lyrics are "Talking 'bout a girl, 'bout a girl with my name" not "with money.") In the pause after "Wait," the singer admits that she could actually have feelings for the girl, even though she had never thought about liking a girl before, but "It's a shame" because the singer doesn't understand her feelings and feels the girl took advantage of her. The part about "You think you know somebody" is referring not only to her once-friendship ruined by a confusing one-night stand but also about herself and questioning her sexuality. The rest is pretty straightforward.
To me, I believe she's singing about a relationship with a girl she's known, probably a friend. The singer never thought of herself as a lesbian and is confused as to why she keeps thinking about the girl who also probably isn't out as gay. The relationship probably started at a bar one night when the singer was drunk, hence "It's a little blurry how the whole thing started" and "Poured it down, so I poured it down." They end up going to a hotel and the singer is too drunk to care. However, the other girl is really interested in the singer ("You were talking deep like it was mad love to you"), but the singer is not really interested in a relationship ("You wanted my heart but I just liked your tattoos"). Either way, the girls have a fling with the singer just passing it off as an experiment, and when they wake up in the morning, the singer doesn't want any type of relationship, though the other girl does. The next verse goes into explaining that the other girl feels hurt by the singer's rejection, but the singer claims the other girl didn't love her anyway. (*Note: The true lyrics are "Talking 'bout a girl, 'bout a girl with my name" not "with money.") In the pause after "Wait," the singer admits that she could actually have feelings for the girl, even though she had never thought about liking a girl before, but "It's a shame" because the singer doesn't understand her feelings and feels the girl took advantage of her. The part about "You think you know somebody" is referring not only to her once-friendship ruined by a confusing one-night stand but also about herself and questioning her sexuality. The rest is pretty straightforward.