Games With Boys

I still play games with boys by lying to them instead of just straight out telling them I'm not interested.

Boy: Can I come upstairs for a bit?
Me: No, my roommate's probably asleep.

Boy: Do you want to find somewhere quieter?
Me: No, I really like these strobe lights.

Boy: Can I have your number?
Me: Sure, it's [fake number].

Boy: Can I come over for a little bit?
Me: No, I'm really stressed out about my finals.

I'm sure that somewhere down the line, it's called 'leading them on,' but I really can't bring myself to tell the truth. Is it my problem that they're asking to begin with?