WOW, this is so sad and full of emotion I loved it.
"Why am I crying over you again?
I told myself that I shouldnt let this begin.
I slice my wrist and my tears mix with blood.
Then I fall the the floor with a big THUD"
I like how you added in sensory.
"Why am I crying when this always happens.
I knew this was it, when I heard the tapping.
I cut into my skin deeper and let the blood drip to the floor.
Why didnt I just think of this before"
Its like I can imagine my self in this i can relate very well, It's like i can see myself standing there crying hearing my blood slowly drip to the floor.
All in all short but full of emotion. Great write!