I'm 22 and I'm a low-key alcoholic
When do you consider someone to be a low-key alcoholic?
When their alcohol consumption is slowly increasing
It's dangerous to abuse alcohol, and it can be hard to stop.  If you feel like you are dependent on alcohol, you should get help, perhaps from an AA meeting.
I don't think I need help.
It's very hard to stop becoming an alcoholic on your own though. You should consider some professional help just in case.