Wow! What you did took courage and it shows that you have the strength and sense to put your needs first. You had an innate instinct that leavingvwas the right thing to do. Ok, you had a wobble afterwards (no one is perfect!) but yet again you chose the best path for you and stepped away again. So you do have some self esteem-and that's an excellent place to start from 😊
It was definitely the right thing to do for your lasting happiness.
As well as books (good recommendations above) it might be helpful to take good care of your physical self too. You deserve it.
A few simple indulgences like a daily body moisturise after your bath/shower to feed your hard-working skin.
If you wear makeup, having a ruthless sort out, wash brushes, clean out makeup drawer and get it all lovely and pristine.
Chuck out holey stained undies and replace with clean nice fresh ones (even with a cheapie supermarket multi pack is better than tatty).
A thorough wardrobe prune and review. Get into Vinted and choose a couple of lovely 'new' things that make you look and feel fabulous.
Talk to yourself positively. Sounds daft but it works. Thank your clever body for looking after you, for being strong, for keeping you going. For healing itself. (I have multiple health issues and use this technique to try and stop myself from being too frustrated. Yes some things are a bit broken and not working properly, but lots else is motoring along quite nicely).
These are just suggestions - You'll find the things that work for you. The essence is on giving yourself permission to carefully (and indulgently) look after yourself. To didn't the time and money. L'Oréal
Really was on to something when they said 'you are worth it '. Because you are. 😊