I don't want to invite our friend on spring break
Why won't you invite your friend on spring break?
He's the biggest liar I know.
You shouldn't exclude your friends from things. They might construe your behavior as being rude. He may be a liar, but you shouldn't use that to justify excluding him.
I hate liars and I just want to ruin his life. He will get hurt and I don't care.
If you feel that strongly about him, then it could be beneficial to walk away from him if he is dragging you down? I don't think you should waste that much effort though in trying to ruin his life because your time is valuable and you don't need any negativity.