Broken

42m here. My wife(40) have been together for 12 years. We also have a 7 year old son and a 12 year old dog. We had been having problems and she asked for 6 months. The idea was to separate, work on ourselves and work to reconciliation....and I thought we were making good progress. We have been communicating better than we have in years, going on dates and we even all briefly reunited as a family for Thanksgiving and Christmas. I was hopeful....until yesterday. Yesterday during our bi weekly couples therapy she told me she was just going through the motions to make me happy and even though she could tell I have put in the work and that I have made the positive changes she was looking.....she can't get past the resentment she has for me. She called us quits. Now I don't know what to do. I just want her. I just want my family.