Depression Treatment Care

My father is more or less an alcoholic. However, he seems to suffer from wide mood swings and changing behaviour. I cannot tell if this is related to his alcohol addiction or some psychological condition. He would not go to see any professional so I have to work this out myself. He also had a tough childhood. He seems to be very sensitive, almost unreasonably getting angry for petty things. What is frightening is that sometimes my behaviour resembles his and I can get easily upset too, however, I learned to control during the years. It is another question, still, it puzzles me whether I inherited anything genetically or am simply influenced by his ‘example’ in my childhood.
Professionally trained people to respond, please.

doctor