Definately go out with your buddies. If you tell them or not is up to you. Not many people know about my sitch (from me anyway, don't know what or to whom he's said anything) I don't see it as helpful and I don't need their input. All depends on you and what you see the advantages vs disadvantages are.
The trip to Colorado is good. Ok, so this time you may spend more time thinking about her and what she's doing. Wear a nice thick rubberband on your wrist. When you find yourself thinking about her, snap it as hard as you can. It will help move your mind onto other things.
Getting away with S12 does count. You're doing good. This is the hardest thing I've ever done partly b/c some of it seems counterintuitive. We all do the best we can and when we learn better we do better. Monitoring your results is one of the biggies that has really helped me. I get lazy sometimes and don't journal the way I should, but it has really helped me to see what's getting a positive result.