I never could . . I'd eat the whole lot!! Now, however, I do not eat it at all and have no problem bypassing the confectionery aisle at the supermarket. I miss it in a way . . but it's better to have none.
I have some strong dark chocolate in my fridge. I can easily stop at one and one stops my cravings although I don't really enjoy it. If I had chocolate around that I enjoy, I may not be able to stop at one.