not gaining weight

so my whole life i have been very overweight due to my binge eating disorder. and i mean ever since i was probably 8 years old. i lost probably 60 pounds and now i’m 19. ever since i have lost weight no matter how much i binge or what i eat i cannot gain weight.

i’m not complaining lmaooo!!!! but it’s just confusing because i am used to gaining so much after i eat.

is this due to losing some of the weight? did it speed up my metabolism? never in my life have i not gained weight after binging. but it’s been a year and it has stayed off of me and i still binge.