It's about a confused woman who's in love with a guy but she still feel the presence of the guy's ex-gf or wife. She's a woman who needs assurance from the man before she decide to give all her love or do the other way, which is to stop and move on alone.
Painful situation to be in, it's so hard to know whether the person really loves you or you are just a rebound. It's a battle between what you feel for him and what he really feels for you. It's like loving someone who cause you pain and cause you happiness as well, that's why you are still holding on.
The hardest part is, that he is the only one who can answer the question and all you have to do is to wait until he bravely tell you what you really are to him.