I found myself going out more when I was suddenly single and the results were also a disaster. For me, I needed to not do the bar scene. I found myself isolating although I not suggest that! I realized that I needed to get to know me and to be ok with being alone before I started thinking about relationships.
Plan ahead when you know you will be by yourself for the evening. Theatre, shows, workshops or classes, or just staying home and watching a movie with popcorn works for some. I also agree that AA has been great as far as being social and finding sober friends.