My best friend and I do not avoid responsibilities. Every time, I do something, I think about the consequences before taking action. Because I take responsibility for all my actions and decisions, I am very popular at school.
My best friend and I enjoy going shopping and phoning each other. We have a good relationship because I do not argue with her. She is a very responsible person. When something happens, she never blames the problem on her friends and tries her best to solve it by herself. Thus, I enjoy being her friend. Two years ago, I told her to take care of my dog for three days. On the second day, my dog ran away, and I was very upset. I did not blame her because it was my fault to let my dog stay with her. My friend felt miserable, and she tried her best to cheer me up by giving me a puppy.
It's correct, but it would improve from some linking so that the sentences connect better:
We have a good relationship because I do not argue with her. She is a very responsible person.
Our relationship is good and we don't argue as she is also a responsible person.