Steve - I occasionally go out with my 14 year old and my ex-wife actually and my relationship was as strong as ever with my partner so I do believe its all possible as long as you remember what you have and are a person with scruples.
With regards to the OP and their issue I would be very careful being with someone who drinks - and we have all seen the effects of this I guess either through personal or family/friends..bad place to be IMHO.

Tone