We are not friends.
You are not welcome here. Either go back outside immediately or crawl into a corner and stay there for the rest of your life.
This is my place of residence and sanctuary. You have invaded it and preyed upon me when I was most vulnerable.
This offense is unforgivable. It will be your last.
I hope you enjoyed the blood you stole from me. I hope it satisfied you. As I lie awake tonight, scratching my arm and my feet, I will be thinking of all the various ways I can kill you.
If you want to live, don't let me see you again. If I see you, bad things will happen to you. If I see you, you will learn just how insane mosquito bites can make a person. If I see you...
...I will end you.