Well, seeing as you never actually said you wouldn't digest him, you aren't actually breaking your word. If he hadn't spent so long babbling and got straight to the point, maybe you would have promised not to digest him.

You look around the room, your room. It's not bad, and it won't take long to add a few personal touches. You sit down on the bed and stroke your belly gently. The squirming hasn't stopped.
"You said you'd let me out!" comes the muffled protests of your recent meal.
"I said no such thing. Now be quiet, I prefer to relax in peace while I digest." Your former room mate renews his struggle, but his efforts are futile. His protests become incomprehensible and his squirming slows to a stop. It feels so good to digest him. You consider taking a short nap when suddenly the door bursts open.