A well written post TennantSmith.
Very explanatory of your circumstances. You know, what you did was stupid, but you're not stupid. Just hurting.
You have a lot of positivity going for yourself. There are many ways into a sober lifestyle. You'll have plenty of friends too. Why not?
I don't think its so much you failed to stay quit. Its more like you succeeded in having some drinks. Try looking at with that kind of attitude and you'll likely understand that you'll always succeed at most whatever you really put your mind too.
Don't give up. Sobriety really does work well enough to have a completely new chance at living.