You are
Faithful to your Principles
Blackberry Cookie.

Blackberry Cookie is strict, sincere, and methodical. When something is not up to principle, she is there to take care of it. She is trusted by many for her strategic way of taking care of things.

Your sense of responsibility and commitment does not allow you to quit when something is left undone. People won't leave you alone for you are the go-to person when problems pop up. You take care of things methodically, and when this is disrupted, you get stressed. But you keep your cool. With your intelligence, you do not get emotional or irrational. You don't help others or interfere with other people's business unless you have a reason to.

You know how to say no and decline, but this might make you appear a bit cold. There's nothing wrong with it, you just know what's right and wrong. You are not that interested in being in a serious relationship, but if you are interested in someone, you are most sincere to them.