Indefinitely means that something could last forever, so Bertie is being dramatic by saying he could speak about this topic without ever stopping. Clearly the topic means a lot to him and he has many thoughts and opinions on aspects of it. </span>
Think of some of the highlights and not so great moments of your life. Also try to write it in chronological order from when they took place. I havent lived your life so I cant really give you examples.
