Answer:
I would call it "Everday Hero"
I would say make the poem personal so that it would make since to you because if I do it wouldn't make since to you I would paraphrase it to be about your own personal everyday hero.
The connotation of this passage is that someone is saying that there is someone who is this persons hero even though they don't have superhuman powers.
The attitude/tone is the way they are explaining to this person how important they are to them.
the shift happens when they are talking about how there is sadness but people can fill the day with happiness just by doing something.
the title should change base don what you want it to be about.
The theme should be about having someone as your hero even though they aren't like Superman, or Wonder Woman.