history: When I lost 20 pounds, I was very happy of my achievement. When I lost 20 pounds_comma_ I was very happy of my achievement. I bet_comma_ that is a great achievment! Loosing weight is hard! Keeping it off is even harder. 
current: Yes, I know. It is very difficult for me to keep it off. I am trying very hard.
next: You can do it! Keep up the hard work :)