Is it normal if im not stable?

I can't keep friends for while; if I find a good friend, eventually I get bored or annoyed and it comes out in an attitude or something so I lose them. I can't stay at a job for a good while as others do; I feel like I can't keep up with the same thing over and over again or else I'd suffer and eventually make enemies at my work. I can't eat and satisfy my cravings; once I'm done I think of the next thing i wanna eat and start craving it. Im a come and go, rushing type of person and impatient. I honestly freak out with the thought of keeping something for a long time, I don't know how i would do it. Eeek.