You go up to your (sort-of) friend. You crack a fake smile.

 "Hey...

 What's up?" you say to him.

 "Well, I was playing with my computer and I just got the urge for some salad. I'm about to top my high score in Tetris, and I could hardly pull myself away. What's up with you?"

 You notice that he is lining up straws on the table. Wow, he must have been playing for way too long. You think about your answer. What seems almost plausible for your lack of a life tonight? Ah, you've got it.

"I have to get up really early tomorrow morning."

 Oh great, he's going to ask why.

 "I have to be there at ten," you say to him. (You never have to be there before noon.)

 "Do you want to come over to my room and hang for a while?" Macrobiotic man asks.

 You think about it. Will you really have anything better to do tonight? You agree to go to his room. He challenges you to beat his high score at Tetris. You manage to do it, although it takes you the whole night. You go home with a weird sense of pride.