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