This question usually comes after the girl has decided she wants to kiss you. She wants to make sure she is not being played. She wants to make sure she is making the right decision. She wants assurance that you will not pump and dump her.
There really is no wrong way you can answer this question. Yes, no, maybe. She has already made up her mind that you are a player and there is nothing you can do to change that. (The fact that she sticks around can very well mean that your player vibe is drawing her in.) Generally, though, you don’t want girls to think you are a player. Their guard goes up higher and you have to work that much harder.
If you get asked this question often, you have to think about what qualities you are putting out that make girls come to that conclusion. To find this out, simply respond with “Why do you say that?” They will usually list a couple things you do that set off a red flag. All you gotta do now is be more aware, adjusting your game so that eventually you become a sleeper. You want to appear to be such a normal guy when you are really the filthiest man in the club. She won’t know what hit her.