Today I had a conversation with this girl. And I just guessed she has a tattoo on her achilles' heel. But she INDEED had a tattoo on there nearby. So she said, "How did you know??" And I want to reply as follows:

"I'm that guy who waits outside of your house every night."

And I want this sentence to be as creepy as possible (for fun). English is my 2nd language. Would you help me?