Does making other people happy mean sacrifice?

Tweet

Sometimes people try to make other people happy sacrificing themselves and they are considered to be great people. But in real sense, sacrificing the self, can anyone make other people happy? No a sensible person can have happiness making other people to sacrifice.If a person can arouse happiness in self, then only he or she can make other people happy because waht I think is-happiness costs happiness, otherwise there is no happiness at the cost of others' unhappiness. The actual relevant event is that one of my friend has handed over his girlfriend to his friend because his friend loves her very much and wants to die without her.My friends girlfriend has accepted for repeated request and promises that is made my friend. Now my friend feel that he does not have meaning in his life and he is becoming abnormal. I have tried to convince him and make him understand but failed. Now it is also least expected that there will be happiness in the couple between my friend's girlfiend and his friend. It is awesome story, isnt it? What do you comment or suggest? Do you accept that sacrifice can not bring hapinness or make happy others?