['My dad used to be a pretty heavy drinker, it caused a few problems in our familiy.', 'That is very sad, did he ever get sober?', 'Yes he finally stopped drinking a few years ago, I was very proud of him and was able to have a real relationship with him.']
That is so great, I hope you have found some healing and closure to the difficulties it caused when you were younger.
My dad had a problem with drinking and it created problems. When he finally quit I was very proud.