Enjoy my sweets

After P.E., which was the last period if the day, you rode your bike back to your house. You open the door and go to the kitchen.

You get a bag of (fav chips) and you eat them walking up to your room.

You lye on you comfortable bed and stare at the ceiling.
You hear a knock at the door.
You go to answer it.
You open the door and to your surprise its Mark!
"Hello there sweetie~" He smiles and waves.
"Oh hello mark! Come in come in!" You say happily.
He walks in.
"What a cool place." He says smiling.
"Why thank you...." You say trailing off.
"So I need to like talk to you about a personal matter." He says no longer smiling but not frowning either.
You look at him with a bit of a worried face.
"Is everything ok mark?" You say.
"No its not." He tells you.
"I need you to back off jack." He half growls.
You nod and gulp.
He walks over to where you are sitting and pins you to there.
He grabs a knife out of his pocket and holds it to your neck.
"I'm not playing (y/n) I will f*cking kill you."
He says in a low growl.
He cuts your arm.
"Ah!" You exclaim in pain.
"Tell anyone about this; you won't be alive anymore, call the cops; I'll escape and find you, it an entire loop.
Stay.
Away.
From.
Him.
OR ELSE!" Mark says.
You shake your head unable to find anymore words.
Your voice completely disappeared.
He leaves and your still there shaking and processing what the hell just happened.
Your heart was racing.
You were shocked and confuzzed.
Was mark your friend?
How could you tell?
Maybe he is.... Maybe he just really likes jack....
Whatever the reason........
You need to be careful

Holy crap I reread this on the preview and scared myself XD