"Irony"

[SimikPK]

"Irony"
Enjoy yourself. Take only what you need from me.
I am here for you, for this, exactly. What you say here is already said in the above line, you do not need to say it again or so explicitly. The ironical tone - which is a strong point in the poem - is already well established there. Also, no need to say it in the heading.  
When nothing's left but a shred of your soul
You're hanging by a thread dying not to let go. Go where?
You know what to do so just look him in his eyes. The jumping among "I, you, she, he"  throughout the poem is confusing 
He knows better so he fights not to cry.
He swallows his pride and it burns in his chest.
You want to hug him, but know it's best. Forced rhyme
The sight blurs then your head is down.
He's standing there with half a frown.
Magnetized by each other's love
No one moves, not even the birds above. Forced rhyme

Earth in awe.
The stars all fall.
The greatest love ever known - If these three lines are ironic, vey well done. If not,...
Has now, just been, let go.
It happened on that day that you stood still.
The scene reminds you as the sun disappears behind the hill.
When nothing's left but a shred of your soul.
You're hanging by a thread dying not to let go.
The moment is lasting forever as she looks you in the eyes.
She's going to say something worth it but instead she cries.
You want to speak but won't dare interrupt. Interrupt the crying? Interrupt would be fitting if she actually was saying sthg. 
Her looks gives your spine chills all the way up.
Your hair straightens and you prepare for embrace.
She's thinking so hard her hands cover her face. This does not seem right. You describe the girl as being very emotional in the scene. It is possible for her to be also thinking so hard at the same time? No offence, ladies. 
You feel weak, you need her close to your chest.
You want to hug her, but know it's best. What is best? This sounds like a forced rhyme. 
Now, where she once stood, is just thin air.
Outlined her memory because you still care.
You've enjoyed yourself. Taking exactly what you needed from me.
I was there for you, for even this, for everything... These lines are abstract, but I guess their main point is to convey the irony, which they accomplish well. The second line seems to fit here, don't know why in the beginning it does not. Maybe because you have shown what had happened. Keep the irony, it is a strong point of the poem. 

What you want to say can be said in a much shorter way - SHE left HIM, he concedes, accepts, but NOT REALLY. Fu*k her. 

It does not sound as poetry to me. It is like a description of a scene from a play, with scenic notes. You use hardly any images in the poem, which is why. You tell, describe, explain. Poetry is about showing. There are many aspects which can be said more specifically in images, I marked them in red. 

The images you employ are all very cliché. Now I don´t know if you use all those clichés intentionally to establish the sense of irony - like being cynical about a "very heartbreaking scene" or not. If so, it is way too long. You could condense them in 2-4 lines, even less to convey the same. Just use the basic elemets - description of the setting, the atmosphere, and the feelings of both participants. 4 lines, as I said. Sthg like this:

At sunset
silence filled the air. 
Her sould was shred to pieces,
for him, painful memory. 

I think it is clear that this peaks of a painful breakup. The challenge would be than to employ devices for making sure this would be understood as irony. I cannot think of any right now and have other things to deal with, but maybe later I will come up with sthg.

If you, however, did not mean the images as irony or cynism, there is a bigger problem and you will have to come up with something much more specific and image-ish. To give a taste of what I mean:  He is standing there with half a frown ---> Furrows of his forehead face the marble at Trafalgar. (or whatever. My example is incredibly stupid but only here to illustrate my point...) - by specyfing the "there" you can add another dimensions and meanings to the poem. Same with other abstract, unspecific things. 

Also, if this is the case, try avoiding words/phrases like "greatest love, memory, nothing left, shred of soul..." at first glance they seem strong but actually say very little. The reader wants some specification, explanation, why the love was so great? (You even tatooed Juliet on your chest) or whatever..  Nothing left ---> "Empty photo frame", "The number you have dialed does not exist" etc.