Need help with a Love song?

I am writing an essay on Love and would like to quote a couple of Love songs, only my mind has gone blank. I would like one song that is full of angst and regret and death, yet still a love song. The other song needs to be the sappiest crappiest love song ever. They also need to be legit songs, I have to cite them. If any one has any suggestions, I would love the help... Thank you!