Beyond the Door by Philip K. Dick

She gazed up at the clock. “He comes out for me because he wants to. We talk; I tell him things. Of course, I’d like to have him upstairs in my room, but it wouldn’t be right.”

Carmilla by Joseph Sheridan Le Fanu

I saw the very face which had visited me in my childhood at night, which remained so fixed in my memory, and on which I had for so many years so often ruminated with horror, when no one suspected of what I was thinking.