Dear Lisa,
I hope I don't come off as a total creep.
Today, the whole time I was peeping through the glass window and I realized something-you weren't happy. The pleasant glow I'd seen on your face isn't there anymore and I wish I could do something to cheer you up.
All day I think about approaching you but given I'm a total stranger to you, I don't want to be seen being dragged out by security. So I guess I'll remain in the shadows for the time being. And I believe the only way for me to talk to you are these notes. So, I smuggled my notes into your room last night. I can see them lying exactly where I put them.
By the looks of it, you haven't touched them. I wish you would read them and realize that you're not alone Lisa. It doesn't matter if your parents haven't visited you or you've got no friends. I'm there and I promise you I'll shower you in happiness if you let me.
-S