#1
Just want an opinion on if I should go on with this...

Your everything to me living
But even more to me cold
Constantly fighting and crying
It just keeps getting old
#2
most definitely
just write loads of lines on the topic, find a melody for the lines to be sung at
and change the words from there if they don't fit the melody

from what i'm understanding its about a relationship that both people love being in, and love each other. but the fighting and arguements is tearing them apart.
just keep writing!