first love first hurt

I don't know what's happening
I don't understand this pain
When every part of my body has no injury anywhere
But why is the pain unbearable?
To the point I can hardly stand
I have no strength, nearly forgot to breathe
Just because you're going to leave me
Can you just tell me before you leave
The pain that you've caused
How could I treat it?
Please let me know so that I can treat it in time
The pain that has no trace or mark
There's no wound, but it too much hurts
Is this called a broken heart?
I just now understand it
Do you know what's going on inside my heart?
I've never experienced pain anywhere that hurt as much as this
Never thought to prepare myself for a disappointment
And this feeling of agony that I have
What must I do to get rid of it?