You're very wise to be aware of this at a young age. I wish I woke up in college instead of decades later. I knew back then I had a problem with booze but just ignored it until it affected my entire life. We had a ton of fun back then, but if I'm really honest with myself I can list many many times where alcohol created problems even at that age.
Spend some time reading here on SR and see what posts you relate to. I'm not a big believer in labels so I don't think it makes much of a difference if you call yourself a heavy drinker, or alcoholic. It's what the stuff does to you, and how you handle it that answers your question.