Not everyone's bitch...

I would like to know why if other people don't do what they say they're going to do and pretend that they were not supposed to then its ok. But if I don't jump at what they want me to do then they get all pissy. I'm over it. I'm done immediately answering my text messages and phone calls and all that other shit. Because I am not at everyone's beck and call. Im tired of trying to please people who are just out for themselves. Just done.