Today I left early. Unexpectedly, unpredictably. I had a headache. That's when I caught you. As soon as I saw you I knew why we were not together. In the hall, I reached to the reception table to place my keys, but they were already there. I looked at you, we both admitted it felt strange without saying a word. You followed me into the kitchen. Dinner was cooking. Damn, why couldn't I have this? Did I not deserve it? You smiled. I looked away in disgust. 

As you busied yourself about the apartment I watched in bitter acceptance. I knew very well why this couldn't be us. It was me. I was too absent minded to really care about you. Too self absorbed in my own suffering to accept any changes you really wanted. Or needed. I was jumpy, quick to anger, self destructive. I'd run riot some nights and sleep for days on others. I don't know why you keep coming back, but I know why you don't stay. There is nobody else to do this though. You're my last chance but I still can't even meet you halfway. If you stop coming, that's it for me. I'm alone, with the worst part of myself. 

I massage the spot where the pressure in my head is building. You finish your tasks and write the note. You take time to present it with care against the dinner plate, then step calmly to the hallway. I'm there waiting, and as you pick up my keys I catch your eye in the mirror. I stare back at my own reflection for a few moments, then leave and lock the door.

Alternative ending!

I massage the spot where the pressure in my head is building. You finish your tasks and write the note. You take time to present it with care against the dinner plate, then step calmly to the hallway. I'm there waiting, and as you pick up my keys I catch your eye in the mirror. I stare back at the reflection of Tyler Durden for a few moments. He grins wildly at me, then I leave and lock the door.