Cute love song project?

For my homework i have to find a song that shows "aspects of a healthy relationship" that sends a positive message.There are just way too many songs and I dunno which one to choose.It would be amazing if the song could be from a band/artist like: Never Shout Never, A Rocket To The Moon,Bruno Mars,All Time Low,Stephen Jerzak,Cute is What We Aim For, Joe Brooks, ADTR, and other music similar to those bands. Please and thank you? :)