I can't stand it when you don't pay attention in class.
C'mon man. You're smarter than that. Don't do your computer science homework while Doi is lecturing.

I know we're friends and I have feelings for you and all, but you shouldn't do that.
You should pay attention. It gets boring sometimes, but I want nothing but success for you.

I know you can do this. I believe in you. Please please please just pay attention.