Alcoholic Husband???

If he chooses to drink everyday and get drunk everyday and will not stop you need to get out before it's too late. Your 4 year old is already taking a lot of notice of his drinking and just think what it will do to your children as they get older. It's not right at all. I would suggest a trial seperation and tell him that he has to drink for you to stay with him. I realize you love him but if he won't stop drinking and then does a stupid thing like cheat and blame it on the drinking but still won't stop drinking you need to leave. It will only happen again, and I don't care what they say, I've been drunk a not cheated on my husband. You need to walk away, because now the children are the most important and you don't want this to impact the people they become.

In the morning when he is sober, try and confront him. Have a heart to heart talk. He may have a problem (maybe financial or work related) that he could not tell you that is why he resorts to drinking. Problems can be solved by communicating. Hope all goes well :)