Well, you could try eating milk chocolate until it makes you throw up. That could work.
Or you could try just going off milk chocolate altogether for three weeks. (I know - I'm cringing at the very thought.) When you think milk chocolate, you could eat a piece of hard candy, perhaps, or a cracker... you need to figure out what will work for you.
The idea is that, after three weeks without it, if you taste a little piece of milk chocolate again, it's NOT going to taste so good. You'll wonder why you thought you couldn't live without it.
This is not foolproof... and I know from experience that you can get "hooked" again if you choose to go back to milk chocolate full time. But if you want to get unaddicted, as a way of starting to be disciplined from now on, it might be worth a try.