How to cope with stress in strained marriage?

I am married with two daughters and a wife going thru a tough time of evaluating what we mean to each other... She seems lost and I have given her space to help her find out what's missing in her life. She has requested we separate, but we agreed that we would give each other space. I do not broach this subject , but support her and listen to her as she go hour by hour, day by day activities. I comment on the good things and encourage her to seek new things in her life other than being a housewife and mother. My problem is I am coping with the possibility that she will make every effort to separate and divorce me. It is a possiblity, but I also hope for the better. She refuses counseling, but she is looking for a job and wanting to do new things such as taking guitar lessons. Those are good signs that she is seeking something for herself. She continues to say the family $$ are not hers, and it is difficult for me to let her know the $$ are for her happiness as well. Pls advise