Yes that will almost inevitably lead to health complications.
The type of drinking it what is really unhealthy. People who binge drink (and 12-14 is really huge) even once a week will have more problems then a person who drinks a small amount every day. So having 1 glass of wine at diner (7 units of alcohol per week) is safe. Even having 7 drinks is one night is far worse than one all of the time.
And you are not doing a once weekly binge you do it several times.
I don't know why you wonder why you are tired. You are drinking a central nervous system depressant that, in part, reduces the amount of activity in your brain. In large amounts it is an anesthetic. It would be strange for you not to be tired. And I hate to tell you that drinking plenty of water, taking vitamins, and getting plenty of sleep does not make up for the massive amount of alcohol you drink. Why did you stop your exercise? Is it because you are too tired? How do you support yourself if you sleep off the drinking for multiple days a week? Do you drink alone?
Here is the simple definition of what alcoholism is- substance abuse (including alcohol) is when a person continues using the substance(s) despite negative consequences. So if you have no problems, you always go to work, you felt completely fine, and your life is in perfect order you would not be an alcoholic, no matter how much you drink.
But it sounds like you are beginning to have consequences and they only get worse. I would see a doctor for a physical with blood work. And discuss your use of alcohol to your doctor, you might even consider a psychiatrist. You might require a medical detox if you would stop drinking because alcohol does have severe physical dependency and withdrawal is painful, dangerous, and occasionally lethal. So they give you a medication like Librium, Valium, or Ativan for a few days.
It could be wrong I certainly do not know you but what you are describing is a problem and you need to stop drinking or cut back a lot. If are are able to significantly cut back on the amount you drink and sustain that you are not an alcoholic. If you cut back and end up increasing the amount you drink that is a very alcoholic behavior.
If you continue drinking this much you truly will have major medical problems. Alcoholism is a very disturbing thing to see, it can cause horrible problems that most people are unaware of.
I am a medical student at a university in Montréal, QC, Canada for psychiatry and internal medicine. I have a Hons. BSc in pharmacology and I have interned with two psychiatrists, one neurologist, and at a chemical dependency rehabilitation centre. In addition, I have worked as a pharmacy assistant.