What song is this?

Just heard it on the radio, Contemporary Hits station, so it must be recent (past five years or so). I only caught the ending of it. Goes something like this:

Cuz I’ll be there for you in your darkest night (repeated 2–3 times)

And then it leads to the main chorus. After that, the song ends.

It’s a rock or pop song with, I believe, a male singer.

Any ideas what song this is?