I'm thinking of possibly getting a friend kicked out of university
Why do you want to get a friend kicked out of university?
I've changed my mind. Although I think someone like that shouldn't be allowed on campus, I've seen a good side of him. I guess I'm confused, but I can't convince myself to go through with it.
Dealing with a friend whose behavior is questionable is tough. You have to know how it affected other people. It depends on the bigger story that comprises the actions. If the actions are bad enough, you should still report him.
I'm so happy to have seen the good side of him.
While it is nice to see the good side in him, that does not always excuse bad actions. If rules are being broken, and his behavior is truly harmful to others, then you should alert the professors of his behavior.