That song about how a a girlfriend will miss you when she leaves?

I heard the song on the radio the other day on a rock station, and it reminded me of an old boyfriend. i dont remember the lyrics, but i remember hearing the song a couple of years back, so its not exactly new. and its not that song "You'll think of me" by keith urban, but the line was similar. please help me if you know any songs like this, it'll irritate me until i figure out what it was. Thanks in advance!