breaking up isn't hard to do

I hate it when people say that they tried to break up with their boy/girlfriend and they wouldn't let them. What does that mean? You either do it or you don't. It's simple. Cut and dry. The second you tell somebody you don't want to be with them, you're instantly not with them--even if they cry, beg and plead or say no. I'm sure that most people don't accept being broken up with, but I didn't know somebody had to accept something for it to be so. Most people don't accept getting tickets, getting fired or their wife's/husband's mother, but they're stuck like chuck.