I was this way when I had ptsd as a teen from a sexual experience that I was not consensual with, from a family member I just met at age 11, and then had to be alone with him for two weeks in terror. Every job I got up until the age of 19 I spent the entire paycheck on the first day and it felt soooo good.

The only thing that changed it was rock bottom. I still lived with my mother who had to declare bankruptcy. I had no choice but to spend wisely after that and I am now pretty frugal. I was also young and not stuck in my ways so much, though.

Only you can change the way you spend money, but advice couldn't hurt. Maybe get a notebook and write down Everything you buy individually, and how much it costed, if it was necessary, etc to be able to reflect on your spending choices.

You can only change if you truly desire to.