I'm trying to write a song about two people they break up and then they go back out can somebody please help me

So far, totally boring.
I take it there is some heartfelt story behind this. You are going to have to try to express it yourself, as you feel it. Write it as a poem without music first.

I Need You, I Need You, I Need You When You the Hear Me Feel Like This An A way Hold You In My Arms