I would rather him not be added to the friend group.
Why would you exclude someone from your friend group?
I feel like he is ruining my group of friends.
It makes sense that you do not want someone else to ruin your personal friend group. However, it is very difficult to keep someone from being friends with who they want to be friends with. A better route may be to just talk to this person directly and figure out the best step to take.
I don't want to talk to him. I think ive made my point.
Then you should talk to your friends about it. You can't control who they're friends with but maybe they will rethink it if they know it makes you upset.