Is there something wrong?

Hello, I'm studying TOEFL speaking.
I made a script, but it seems awkard a little.
Would you correct awkard part?
The subject is 'Challenging experience and how to overcome it.'

For me, the most challenging experience throughout my life is when I didn’t get along with my best friend. I overcame this with the following methods.
First, I tried not to feel jealous of my friend. Whenever we do something together, I always compete with her. In addition, if she gets a good grade, I envied her and didn’t sincerely congratulate her. But after I tried not to feel these feelings, we could more get along well with.
Also, I tried to back off. My friend and I usually quarreled about trifles because we always win each other. So, I tried to think in her shoes. After that, our distance became closer.
With these methods, I was able to knit up the friendship with my best friend.

Thanks.