Lyric discussion by erie_bound 

Cover art for Smile lyrics by Portugal. The Man

There are so many problems with the world that it's overwhelming. Better to just tune all of that out when you can and try to find (and create) what happiness you can with the people for whom you care.

I don't think John is mocking the speaker like he was in "Purple Yellow Red and Blue." Both speakers are choosing escapism, sure. But rather than escaping all the crap by pursuing pure hedonism, this guy is selectively ignoring the awful to enjoy the beautiful. "There's so much good to be found, and it'd be nice if I could tune out all of the bad every once in a while ["I'd like to try to forget..."], stop worrying about mortality ["never growing older"], and just smile with you and pretend that the happiness can last."

My Interpretation