It used to be so easy for me to stay on a strict diet.
I was a pescatarian for 7 years and could feel satisfied enough after only eating once a day, that's how i stayed thin.

I've Decided to start eating regular meat again since 2022, and gained 25lbs..., went from being a size 0 / 100lbs to 125lbs.

I want my thigh gap back so i can look skinny again but it's feels harder to diet this time around than it did when i was a teenager.
Is this an issue with a slower metabolism now or the fact that it's harder on the body to go from eating meat to semi vegan?

It's like after 2 or 3 days of my diet, i'll quit and go back to the meat. It's so frustrating.
I wish i was as strict as i was when i was younger.