Anxiety, over thinking.
I'm literally someone that feels like "myself" when I have 2-3 beers in me. I know that I can drink and I'll feel comfortable. I never felt uncomfortable drinking because I would just drink for the buzz. Example 6 pack would last me 3 hours, 12 pack would last me 6 and a 15 pack would last me 8. I'd drink to hold a feeling of comfort and enjoy the time with my anxiety not battering my brain.
I drank to medicate my anxiety and overly active mind. I've learned while being sober I have horrible memory retention and have since I was younger due to how much my mind races, I'm not really able to process things enough to store them long term. I just store little chunks & pieces. I can remember more stuff from when I was drunk than sober.