How to fix metabolism?

Well when i was younger i had an eating problem...i didnt want to eat lol yes i was anorexic (i know its no joke) but why dwell in the past? anyways now that im 26 and have 3kids im trying to lose weight (please dont comment on diet pills, diets ect. i"ve been there) we're exercising (hubby and i) but he loses it so fast and i think its because i messed up my metabolism....i just want to know how to fix it lol i eat healthy but i'm finding myself not wanting to eat and under eating and i really dont want to go there again i think i need a plan or something....oh ya i weigh 176and my goal weight is 125