My girlfriend left me after promising marriage. How to get back the money I spent on her?

Thank you so much for overwhelming amount of support in comments and DMs for my previous post which is linked here - https://www.reddit.com/r/LegalAdviceIndia/s/VDYJoUdn92

I'll keep it short... I believed that she'll be with me forever and even her mother used to tell me things like talk to your parents we'll fix the engagement, etc... So, I used to spend a lot of money on her. She used to ask me to buy a lots of things shamelessly and I used to buy them for her. I'm also starting to realise that the girl and her mother scammed me for the money and she never loved me to begin with.