Hi Bart - How are you doing today? Relapses suck, but like Matt said it can also be a learning experience. Now you know the next time you are going to be alone all weekend you want a solid plan. Alone time is a huge trigger for me too and I keep a running list on my phone of things to do should I find myself alone and tempted.
Keep coming back to SR even when you don't think you need to...it really does help "keep it green".