Can I cut contact with the guy who has a crush on me?
What will happen if you cut contact with him?
He will go on with his own life without bothering me
He should have known to stop when you weren't interested so it's good to cut contact. If someone can't take a hint then they will only continue.
How am I supposed to know what he will do?
You don't have to worry about it. Just move on and let him work it out himself.