I know it is hard but try not to worry so much about what she is thinking. Here is an idea for you, when you have the kids, ask if you can drop them off early so you can get to a (fill in the blank) night out with friends, overnight trip with friends, dance lessons, happy hour with a bunch of people, to the spa. Something that will have her wondering wow, who is this guy. Look great, smell nice, do something different with your hair, have on some new shoes, whatever. She may or may not do it then but eventually she will ask, what is this? Just say, ever since I got some help with some of my problems I feel great and I want to enjoy life, and not have it pass me by.
This will entrigue her, ask herself if she is missing something with you, and also wonder what all of this is about. And maybe most importantly am I loosing him?
Mostly she will see a happy fun you, regardless of how you got there.
