I think I may be an alcoholic.
That is very concerning, why do you think you're alcoholic?
I think it's possible because I can drink a lot without getting drunk.
You should get professional help if you think you might have an alcohol addiction. It might be helpful to monitor your drinking and try to cut back if you're noticing that you're drinking more and more.
I get hangovers easily.
Yeah, I don't think getting constant hangovers is healthy, as it may cause brain seizures and possibly permanently damage your brain. If you can't personally stop drinking, then again, I suggest you get a therapist or maybe go into rehab before it is too late.