Welcome to SR. I didn't drink every night to start with but ended up that way.It is progressive. Even if it is only once a week that's all it needs to be to cause a lot of damage. It doesn't matter what others do or how often you drink.If it is causing problems for you when you do drink then it's a problem. This is a great site and has been fundamental in getting and staying sober. Hope you stick around
p.s I'm in Scotland too