Why?

Why do you do this
And why do I fall for it?
We were so happy
And then you dropped me like a bag of bricks
You act like you used to one day
And the next day act like I dont even exsist
How can be this cruel
And play with my heart?
Better question...
How can you do this
But yet I still love more than anything?
Why do I set myself up for getting hurt
When I know I cant have you again?
Why?