Answer
Polite and friendly does not always mean nice. There IS a difference. For example, kidnappers of children are known to lure children by being friendly, and sometimes polite, but they are NOT nice people.
The word for when somebody's actions are all for their good and nobody else is SELFISH
People who think only of themselves are often referred to as selfish or self-centered individuals.
Selfish
Selfish people think only of themselves and only do things that will benefit for themselves. Selfless people think of others before themselves caring more for the welfare of others.
ballantine means: a selfish, in-love-with-themselves, stuck up, annoying person ballantine means: a selfish, in-love-with-themselves, stuck up, annoying person
somebody that is self centered or selfish and only care about thyself and always draw attention to them selves.
because they are selfish and cannot give of themselves
self-centered, selfish, egocentric
a selfish person only thinks about themselves, they often times are not kind and everything has to be about the, they also tend to like attention
A male chauvinist pig is a person, who is devoted to themselves and their beliefs...They are full of themselves...Meaning they are selfish and not one to hang out with...
You can not really get someone to be less selfish, whether she is your best friend, enemy, classmate, etc. If they are selfish, then their selfishness is already in their personality, and you can't really do anything about it. If they try really hard, though, they might make an effort to stop themself before they say anything selfish, or correct themselves after they say something selfish.
It just so happens that most of the time they are. When they subject themselves to something they of all people know that is bad, just for the addiction. I think that is pretty selfish.