It takes less calories to feed the new, smaller you than it did to maintain your larger body. Maybe that's why weight loss tends to plateau as we reach goal. There are some tools to calculate your TDEE, Total daily energy expenditure (calories), based on age, height, activity level, goal weight. It seems unfair that you get to eat less if you are shorter!
http://www.fat2fittools.com/tools/bmr/
Once you calculate your BMR, it takes you to TDEE
btw, I've read a lot of positive results from Intermittent Fasting though they say people with eating disorders should avoid it.