What if I someone to cheat on his girlfriend?
Why would you want to do something so destructive?
I want him to be free of his relationship
I think this should be your friends decision, not yours. It's wrong to encourage your friends to do such bad things. It's best for you to mind your own business.
You are too sensitive. Everything is fucking fine.
What satisfaction would you get out of destroying a relationship? How would you feel about someone that did that to your parents when you were a child?