Treating every girl like a queen isn't necessarily a bad thing, but it's certainly not a wise thing. Not every girl deserves to be treated like a queen. Not every female deserves the time, energy, effort, creativity, skill, self-control, and intricate level of selflessness required to treat one like a queen. Many females will abuse this treatment in ways that results in your heart feeling carelessly tossed around. The most wise decision is to only treat special girls like a queen.
No, it doesn't make you a bad person. However, I believe in one "earning" treatment rather than giving it to them automatically. That may make someone feel entitled and they may take your kindness for granted.
No I don't think it is but if u have a girlfriend u have to treat her different than the other girls you have to treat her better and I guess show her more attention other than that though I think you should keep treating all the girls like that