I convinced my girlfriend to skip visiting her grandfather in the hospital
Why don't you want her to visit her loved one?
I didn't tell her about his condition, and that he probably won't live much longer.
It was awful of you to lie to your girlfriend about her grandfather's condition in order to keep her from visiting him. People should visit family member's when they're ill in order to make them feel better. I'm sure your girlfriend will be very angry when she finds out what you did.
She's still here. All she does is play games. I should have done that a long time ago.
You should tell her what is going on with her family member though. It is not okay to try to convince her not to see her relatives when they are ill.