Very creative idea. I like what you have done with the other titles, and until you pointed that out with your added note at the end, I wouldn't have guessed that at all.
I like how the poem seems to be about love, but also the emotion that becomes conflicted in love. The good and the bad. The emptiness V sadness is powerful, and relevant to love. We often feel alone, and empty, so we become trapped inside a love that isn't very real, but we feel it is better than nothing, only to end up hurting more.
The opening stanza is strong because you portrayed the devotion you have to this other person by saying you only live for them, you only survive because of their love, and this is what gets you through the days.
I like the fearless love. I think the ideal love is fearless, but it never is so. Fearless love would imply that the person loves you no matter what and does not fear anything in the future about you, about how you change, about your flaws, about any barriers you put up. If they are fearless, and you put up walls to protect yourself, this person would be fearless in breaking them down to get to you. I like this idea.