work out painful emotions in healthy ways (i.e. not through eating)

I don’t know why I hung onto you so long
Believing we’d end up together
When we’ve both carried on
It hurts to see you with someone else
But now I can give my present 100 percent
Knowing we’ll never be
I can let my love for you die and nourish it no more
Because all hope is gone
And you’ve moved on
probably were never there
Except for in my head
Now my head and heart have evidence that it’s over
And my heart is free although today it is heavy 17 months ago