Cut and scars

I cut my skin,
I take these pills to make me thin,
These scars have been on my heart, even from the start, Yet you still make fun of me as if it was an art.
Its not so funny, must I begin?
The blood is runny,
You still think its funny,
Even though I harm
I see the blood drip from my arm,
Lets see what happens when you begin as I end.