The cycle will start again

I have came to a realisation as I sit here, waiting for you
How F**king stupid am I  
As I have just realise that  
You don’t care about me
Only when it suits you
I have to stop letting you get to me  
I need to strength
I need to forget about you
Not the lesson that you have taught me,
Just you
I need to start learning
That not everyone that comes into my life  
Deserves to stay
The way you have treated me
You once had that right
But you have taken it away
I know this is how I feel right this very minute
But naively know that all you have to do  
All you have to do is
Say hello
And the cycle will start again