Your own behavior certainly influences your children. There is a big
chance that your children will take over your drinking habits as being
something obvious. So dealing with alcohol in a sensible way can have a
positive result. If you give a bad example this can have a negative
result. If you drink to get rid of your tensions your child may easily
think that it is good to use alcohol for that.
Nevertheless, you don't have to feel guilty immediately.
You should be aware, however, how you deal with alcohol and drugs. You
shouldn't avoid a conversation about your own use but use it as an example
of how you should or should not handle these things. Show your strong and
weak points in relation to alcohol or tobacco. If you are wise with
alcohol you can tell how you deal with the risks. You can say that you
have made certain deals with yourself, like not drinking when you still
have to work, do sports, drive a car or do other important things.
If you are unwise with substances, like tobacco, you are the best person
to make clear what an addiction is. You can say that you want to quit, but
that you don't manage. That the addiction happened so fast. That it
happened before you knew what was going on, etc.
So it is important to be as open as possible when you talk about alcohol
and recreational drugs. Your child will see your strong points, but also
the traps that you fell for.