You stated:
"i haven't consider going to one yet. i guess i'm more afraid of what might happen. change is kind of hard for me".
Continue to drink like you have been and the "yets" are sure to come. If you haven't gotten a DUI yet, if you haven't gone to jail yet, if you haven't lost evreything you ever loved yet, bottoms up pal! and join the club if you choose to do so. It looks like you are well on your way after pushing around your woman. If you are afraid of change, think about spending some time behind bars the next time you decide to rough up a woman. Chances are you will.
Go to an AA meeting. It ain't gonna kill ya. You very well might discover the source of your drinking. And yes a person would drink just to drink. I loved to drink. I liked the taste of an ice cold beer and I liked the the buzz. I just regret I didn't get help at 23.