Have you ever agreed to something that you really wanted to say no to? There are many people who agree against their will for fear of hurting others or being bad to them. We often take on responsibilities to keep others happy, which are very difficult for us to fulfill. As a result, many people experience mental stress and its impact on their personal lives. Respectfully refusing a request is also a great social skill.
What kind of social life is that or is it because of the term applied
"no"? I see that as a common verb which even a child can decline your subject.
If you displease yourself to please others, you suffers it and if you are easily controlled by others, you won't also make it a long way because in life, there are people who are fond of feeding on others like the saying that... Monkey is working and baboon is eating where he did not work.
So tell me, is the social skill you mean just about pleasing other people? I am sure only a fool will cheat himself life that.
I myself, I can not trade my happiness for others. There is also sacrifices that may worth it but not the ungrateful manner of helping others while you are not happy yourself.