What do I do now?

I can't fathom the semantics of this.  
One day in my past you didn't exist
But here, now, my head is overtaken with it.  
With you.  
 
I'm meant to be good with words  
But there's no verbs that do this justice.  
Shakespeare seems inferior  
When i compare to my souls interior,  
And yet there you are,  
Plain you,
Just you,  
Taking up all this room in my heart.  
 
An atrium now malevolence,
A ventricle still love, no consequence,  
The blood that passes through
Both loved and tainted in equal parts.
 
Where do i start?
I don't know how to begin again,
I'm done with the cliche it's not the end,
I don't ever want to be your fucking friend,
You've broken every vow.
 
From now?
I'll go for casual ambivalence,
Feeling worse than hate, indifference,  
I just want you to become insignificant,
Yet the turmoil tears me in two.
 
It's you.  
It's always you.  
Please just tell me what i should do.