unrequitted love truly sucks. There's possibly, though, one of the best quotes related to it.
"Every broken heart has screamed at one time or another: 'Why can't you see who I truly am?"
I think that this song goes along those lines all the time. The thing is that we all want that person to love us and see just how great we'd treat them and for them to see that no one will ever cherrish them as much as we can.. that's what we want to believe anyway. And still, the person won't understand because they simply don't feel the same way. And the te amo might get lost in translation due to that.