My dad went on business trips for a good chunk of my childhood, and ever since he stopped going (3-4 years ago) his drinking at bars has gotten worse and worse. First it was going out to sport grille/bar couple nights a week, then turned to going almsot every night, and few years later now he goes to a bar 2-3 times a day. He goes right when he gets off of work, and then again for dinner. My brother said he saw his car in the parking lot of a bar at 7:30 am, and it is obvious that he has a problem, and something is going on in his life that he has to drink down all his problems. He hasnt been the same since coming back from his business trips, and im 18 and just dont know what to do.

It seems like he feels obligated to go there everyday, like those people are his friends, but in reality they dont give a crap whether he's there or not, theyre just there to get their beers, even his attitude has been worse, i dont know if hes on mid life crisis or what, but its just really bad now, its affected my parents marriage, and our family life

Jon Brush is right. There really isn't anything you can do about it as far as getting him to stop. He has to realize that he has to stop. And it may cost him his marriage and being involved with the family for him to realize something is very wrong.

Al-anon/a-teen meetings might be for you. If you are unable to move out, you can learn at these meetings what detachment is.

I have to disagree with JonBrush and LoneWolf.  Alcohol, drug and food addictions are devastating to everyone around the person affected, but If you simply "move out and forget about it" you're not going to help him or your family.

Talk to him.  Tell him what you're feeling and tell him that you love him and that you're worried.  Get him to realize that he has a problem. Talk to your mom and your brother.  Convene an intervention.  There are plenty of resouces out there that will send someone to your house for an intervention, including AA.  Tell him that he's hurting himself and his family.  Attend AL-ANON meetings and offer to attend AA meetings with your Dad on open nights.

There was a time when my father would come home from work and head immediately to the fridge.  The entire bottom shelf of the fridge was dedicated to cases of Labbatts Blue Ribbon.  If one of us got in between the front door and the fridge when he was on his way to his first beer, he'd get pissy and rock from foot to foot until the path was clear.  After an intervention, he quit drinking...no AA, no meetings, no sponsor, no Al-Anon, etc.

It's going to be difficult.  Facing down your dad is going to be the hardest thing you've ever done.  But, it's better than pretending you don't care.  Confronting him and leading him to help is the least you can do.   I'm sure your dad knows what he's doing and how his actions affect his family.  Make it known to him that you know, too, and that it hurts you; he might surprise you.  Obviously, as others have said, an addict cannot be helped if they don't want to change.  But, you have to give it a shot.

I've become bitter with it I guess, try talking to him before you give up on him. But it won't be pretty, you might see something in his eyes that you never thought was possible.