It's not pop psychology, addiction is mind over matter. You are no longer physically a vampire, are you? Ergo, you do not need blood, it is an addiction that you cannot face because you refuse to face the truth of your new physiology.

[He frowns at the laughter, though not angrily.]

If you accept there is no requirement for you to imbibe blood any longer, then you can begin to treat your uncontrollable urge to drink it even despite that.