Couple
Only one can't be counted as couple, because the word means 'a pair'......
So in a relationship, if one felt alone and only one was contributing to that relationship, it couldn't hold.

When the one you love is around you, you feel strong, you have the faith and strength to do anything successfully, it feels like you can even conquer the world.

My dearest fellow, who has walked through the valley of the shadow of death, i hope you would enjoy that feeling afterall.