"Suppose it's just a point of view" ??

The singer is saying that other people tell him he is "doing fine" but as the tone of the song suggests, he is sad.

To say that an opinion is "just a point of view" is to suggest that you may not agree with it.

PS It can be a mistake to analyse the lyrics of pop songs too closely. Often the words are made to fit the music, to convey a mood, and are not intended to mean very much.

Thank you contrex! It helps!