Considering that moderate drinking is defined as up to 2 units daily for men (1 for women) you are drinking way over the healthy limit.....
If something other than alcohol (like eating apples, for example) caused vomiting, black outs, concern from family, would you still insist that it wasn't a problem for you?
I think you're doing a lot of rationalization (which is another typical behavior for us) and as a medical student I'm surprised you seem to feel that your level of drinking isn't doing harm to your body.
AA suggests that if you doubt you're an alcoholic/alcohol abuser, try stopping for a period of time, like 3-6 months. Most of us couldn't do it until we committed ourselves to a program of recovery.
I don't think I even knew how much of a problem I had until I tried to quit!
