A piece of my mind

We had the same conversation agin. I keep telling him he does not exist; he is imaginary, only in my head. He says he is the only thing that is real, and everything else doesn't matter. I tell him he has to leave, and he insists that I'm the one making him stay.  I tell him I'm too tired to argue,  how is it he only comes around when I'm most vulnerable. He says he comes when knows I need him. And like always, I end up asking him to stay, just tonight; to hold me until I sleep. And like always, he does. And like always, I miss him when he goes.

How do you tell a stranger, I love you The idea of you Everything about you The thought of you never leaves my mind Seeing you makes me smile ? How do you say all that without blushing like a 14 year old when you’ve already doubled that age? And how do you expect the stranger to react?