Most personally sentimental song

I have been thinking about this for the past couple weeks because this song came on when I was out with my current lady. It actually came out after I broke up with the person it makes me think of but it became the song I most associate with her. She was the love of my life. The "one that got away" cliche. A long time ago but this song is probably the most personally impactful to me. It always makes me think of her. dailymotion.com