Welcome to SR, Stryped!
Insomnia is a common symptom of alcohol withdrawal. I went through it every time I tried to quit, and honestly it was the #2 reason I would go back to drinking (#1 being that I liked the effects of alcohol). It will go away with time.
Look, you may have been sleepwalking or you may have been in a blackout. I doubt that matters because it sounds like this behavior only happens when you drink. I too woke up and did things in the middle of the night that I did not remember and regretted later.
It says a lot about your father that you see him as a role model. Do you want your son to feel the same way about you someday? Continuing on your current path will almost guarantee the opposite.
Keep posting and reading. You will find a lot of help and support here. Good luck!