She won't believe your changes at first so stick with them and make them permanent. A woman that used to post here a lot had a saying that went something like "180's + time = changes she can believe in". Most people do 180's for a week or two expecting to see a reaction, and when they don't get it they give up and go back to their old ways. TIME is a critical factor.
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You want to be a bit mysterious. Don't offer up info on what you've been doing (or not doing). Be brief. Be the first to hang up when she calls. Don't always answer right away when she calls. Don't always respond right away when she texts. Right now she sees you as low value and undesirable. You need to do things to change that. Dress nicer. Keep your hair styled. Wear cologne. Get out and be with people. Get back in touch with old friends. Meet new ones. Start a new hobby. Get fit if you're not already. Get a tan. I'm not saying to start dating or even to act like you're dating, the idea isn't to make her jealous, it's to make her wonder what you're up to. She needs to learn to miss you.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712