Do you think it's bad that I don't want to play beer pong with a friend of mine that has herpes?
It seems inconsiderate. Why do you think he has herpes?
It looks like he has sores on his lips that look like herpes. I don't want to catch it.
I think you're safe to meet with him and hang out, I don't think you'll catch herpes. You should suggest your friend sees a doctor, but make sure you don't hurt his feelings.
I'm going to tell him I don't want to see him until he gets it treated.
This is your friend, so make sure you treat him with kindness and compassion. Don't be rude to him or shun him like he's a leper.