Have a nice life

I now know the words,
That echoe in a mans heart,
To some it means and ending,
To some it means a new start,

The saddest words to ever,
Be burdened upon a man,
With the strength to build you taller,
But break you again they can,

I think I know the meaning,
Of one heart destroying everything,
If one heart means the world to you,
And leaves you alone with nothing,

If these four words are spoken,
By one man to his lover,
Be aware it will destroy her world,
Just for the fun of another,

As these words are dangerous,
Kill anyone in there way,
To eat at you slowly,
Is the purpose of there day,

Be aware of anothers feelings,
Don't mess them around,
Because one day you'll be hurt,
And they wont pull you off the ground,

Don't tread on peoples hearts,
And leave them to repair,
Bear in mind you killing someone,
By drowning them in despair,

Don't leave someone alone,
With those four words to end it,
Don't let it live in their mind,
And make them feel like sh*t,

With those words I leave you,
And live my life in strife,
So I'll say it so you know,
Have a nice life.