The distance is part of the process. I know it feels extremely odd, but try to keep it up. The more you pull back, the more curious she will become about what is up with you. Continue to try and be happy when she is in the same room, but don't talk to her unless she starts it. This worked for me, maybe it will work for you. I soon felt my H staring at me because I wasn't saying anything or letting his moods affect me. So it got him curious.
Me:49 H:47 S: 16 T:27 M:25 My EA: 2001 His PA: 10/2007, 6/2013 Separated, but H still in house
Find your Shambala: a place of peace and happiness.