Name of a Song
 

Hello,

There is this clip that is stuck in my head. I don't know the song's name nor the singer's name. All I remember is what the clip was like and I really liked it back then. The clip was something like this:
there is this girl at the airport, and her boyfriend texts her while you hear a heartbeat or something. So she starts running back to the apartment and you hear a gun shooting (the guy shoots himself).
I think it was something like a break up.
Sorry if I'm being vague. Could anyone help me?