CH, you must be feeling a great sens of loss. You've worked hard for a relationship that isn't for you right now, and that is PAINFUL!
She has to do what she thinks is best for her recovery. I know it is hard not to take this personally...
Please take care of yourself, by letting her go, and being kind to YOU. This is the time to figure out the things that make you happy, the things that keep you at peace and content when you are alone.
I'm 37 and am just figuring out who I am again, it is difficult, painful, and LIBERATING! It will also set me up for success in future relationships with friends, family, work, and romances.
I know it is difficult right now, but seeing this as a positive thing for your life will make all the difference. (((HUGS)))