An urban meaning of a red lighter is a lighter that brings bad luck to the user, and those around them. I imagine the song meaning what is explained before me, but as the lines go, "Even after the storm, the clouds are reborn but it's never been wetter
It must have been fate, two hearts didn't break, it's gotta get better
I'll keep these thoughts alive inside to remind me whenever
I'm down and out, I'll think about when you said forever"
I believe it implies at he brought the bad luck upon the relationship, and everything that happened being his fault.