Someone have the same your trouble. But MyEtherWallet.com is not a bank and it can not help to restore the password. If you didn't save any files of your MEW and you forgot the password, you may lost your wallet.
I think you only need password when you register and have your Myetherwallet address.The private key when you have successfully made your account is the very important code that you must not share to anyone.Keep it safe for you own good.Because you can make another Myetherwallet account using any password.