<human>: Can you give me the gist of the text in a nutshell?

Original Story: 

So, here's a quick summary of what happened: My father(44/M), in a bad mood, decided to call me(16/F) out on being fat in the middle of Costco, which sent me to the bathroom crying.

*I'll admit, I've been sensitive about my weight since I was ten years old.*

Here's what's happened: My dad apologized, making up the excuse that the grease on the pizza looked too fattening and that he didn't think of how to word his thoughts before he said them. 

**I've also decided to start an even healthier lifestyle.** I'm counting calories, hoping to drop 20-30lbs by April, and I'm making a commitment to work out by going to Taekwondo more often and taking evening walks when I can't make it to Taekwondo. I have a neat little calorie tracker app on my iPhone now and a BMI calculator. Also, I'll continue going to the gym after my dad returns to his work in Afghanistan.
<bot>: Thanks to the people of this subreddit, I got over the fact that my father is an ass and I chose to make a healthier life for myself.