Stalked By Slender

It started last Wensday on my way to a friends house in the woods.He asked if i seen Slender Man i said no well on the way back home I seen him... that face its nothing not even a face. I tought nothing of it until the next night.
I had been woken up by the sound if knocking on my door i ooened it and no one was there i turned a round to check the back door and i seen him by the woods. I lock the door and ran out of the house to the police staion they said they couldnt help me so i whent back home and tried to for get every day it gets worse.