Awaw, yea, igit is right. You are early in this. Luckily you found this place early on. You can definitely undo some of the harm done by your early reactions. Really work on the 180s and your PMA. Those 2 things will be noticed and make her wonder. Do not be so quick to label her a runner. Remember, as hurt as you are now, she has probably been hurting for a long time as well.
I would NOT file. I am guessing you REALLY do not want a divorce, so why work towards it? Yea, she might be cake eating, and yea, she might be having an A. Its a harsh reality you will have to accept for a bit. Your best course of action is to absolutely let her do her own thing, and do not get in the way. GAL is a great way to help you cope with what is going on and keep your mind off of what your W is doing 24/7. I would definitely go NC/LRT right away.
I really see a lot of my situation early on in yours. I hope you avoid some of the mistakes I made!
Keep your chin up and keep posting. You will find a lot of support here. And read other people's threads. They will help you understand what your W is going through and what to expect. These things almost always play out the same.
Me: 42 W: 32 Married 7 years together 8.5 S1: 7 S2:7 Bomb #1: 09-16-13 Recon #1: 11/13 A discovered 04-03-2014 W filed D 05-19-14 but never served me I filed D 12-02-2014 S 05-31-14 Divorced 5-19-16