I'm 5+ months in, and believe me, it does get better. The sleep gets easier, but every now and then, a sleepless night will creep up on me and remind me I still have a long way to go.
I've had to just let go. And that's been the hardest thing I've ever done, but also the thing that has saved my sanity and my life.
Like you, the GAL activities have been vital in recovery and growth. Keep at it! Keep telling yourself "I will be ok", and commit to it. You can do this!
Me - Mid 40's W - Mid 40's Married 20 No kids BD - 7/2015 ILYB... Moved out 2 days later Suspect EA