4. Changing your phone number and email address to make sure he can never contact you again.
“You really want to go that far just to get away from me?” said one guy. Regardless of your true intentions, cutting off communication like this can make your ex-boyfriend feel like a total failure. Although this is an effective way to break things off with clingy or even vindictive guys, if you’re changing your number for some other reason, you should follow up with him.