Confused and lost but trying to figure things out

My wife and I have been going through a trial separation now for 5 weeks. This is after 10 years together of which 6 we have married. We had a beautiful relationship. We both felt like we did and people would always say how they could tell we had a good thing. For 2 years on and off now I have been trying to earn credentials to better my career. This put a severe strain on our relationship due to the time it required. I was selfish sometimes and expected her to stay home while I was slaving away studying. Her leaving was the wake up call of a lifetime. I realized that short after she left that all my efforts were not worth losing the love of my life especially since financially we are fortunate enough to be comfortable. Since she has left to stay with family, I have started to focus on myself. I have been working out to really change my health. We talk in person once or twice a week. We text almost every night. She is deeply hurt because of the bad attitude and ignoring that occurred when I was focused on studying for so long. I admit my guilt and I am truly changing. I expressed my love for her and that I want our relationship to be better than before. She has expressed that she wants to work on herself and us as well. However she also said she is not sure she wants to be with me for the rest of our lives. I was confused by that at first, but I understand due to the deep hurt she felt. I tried to avoid contact for a few days and that seemed to upset her. She felt like I was glad to have her gone. I told her that was definitely not the case. I explained that I always look forward to talking to her and seeing her. I said I did not want to smother her. She said that she like the communication and would let me know if it got to be too much. Sometimes she gets upset when I text her cute pics of our pets or try to be romantic in a text. She missing our pets which I understand. She tells me it is going to take time for her to heal. I understand that I need to have patiences. This is difficult for me because I do truly love her so much. I am not a man that cries but since she has left I have cried more than ever in my life. I guess the big question is what can I do during this period of time that we are separated. I know I neglected myself for a while but I am taking care of my health now. What can I do to work on our relationship? Is there anyway to get her to open up emotionally since she is closed off due to the hurt she has felt?How long can I wait before I should see some change in our relationship for better or worse? (Hopefully for the better.)

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