My wife is the same. She lives her own life, makes her own plans, she doesn't even have the courtesy to tell me when she'll be home for dinner so I can organise dinner and the kids with her.
You're right, you're not a priority to her right now. Look at the positives though. There's less fighting, right? She speaks less about divorce, right? She's more pleasant to you, right? I look at these things from my wife as positive differences from BD and platforms from which to work from.
Me: 31, W: 29 T: 4 M: 2 Kids: 3 (SS: 7, SD: 4, D: 3) Separated, still living together: Nov 2013 Separate bedrooms: Feb 2014 W working away; kids with me: Nov 2014