OP no longer needs a password to log in wallet because he already saved the Private Key to open the wallet, it has been explained on page 1 above by the community and OP seems to understand very well what the question is. Even logging in with the private key is sufficient and doesn't require any password open it in order to transact. Other problem is that he must carefully look at the myetherwallet address because there are a lot of phishing.
The private key must be guarded and not used if it is not needed and don't connect the wallet with phishing, my friend didn't realize he connected the wallet with phishing but I immediately suggested moving important coin assets to a new address, because it could potentially be hacked because they have already transacted approval of automated requests from phishing websites.