Everyone hits that "it's about coming from a broken family". Everyone says something about her parents. It's not about her parents and it's not about a broken home. It's simply about love. Yes, the examples given were about these things, but that makes the song exclusive, which the song is anything but. Simply put, it's about how love is almost elusive. That love is hard to find. That love is hard to believe in and that the thought of love will make anyone jaded. So many times we say the words "i love you" only to find out later that we should have said "i lust you". Love is mean and cruel. So why would anyone want to sing about it? All too often people give up hope on the thought of love and then bam. It happens, and the exception of your life brings you love.
No matter who you are, no matter what you've done, love exists. Love is real, and if tomorrow you were to wake and that love was gone, you would want to remember it. "it's better to love and lost than to have never loved at all".