Marriage ending if I can't figure this out.

We've had problems for a long time but I'm going to try to make this short. I was always put last in the relationship my mother in law was first. my wife was essentially still living like a child when got together. her mommy coming over to her house to cook and clean while she was at work and paying the horrible credit card debt she racked up and I put an end to all that and made her grow the hell up and finally this year my wife FINALLY made it clear I was the priority and told her mom to back the fuck off. My wife never communicated with me or threw tantrums when she was upset and has been super co dependant and she has gotten therapy and is actually making huge improvements. When I told her our marriage was over if she couldn't start making some changes to improve herself she did. The issue is me now. I don't know how to let go of my anger and resentment. She can't fix things alone and I realize I'm the one that needs to make improvements now but I just don't know how. I'm a stay at home mom so money is tight and she needs the therapist more than I do so I can't do that and I have very few friends and none that could help with this so please any advice? How do I start to let this go?