TOEFL: Pets not only can be our best and helpful friends but they also bring happiness for us.

Different people have different kinds of life style. Nowadays keeping pets and treating them is a common way for some people to use their free time and make their life more enjoyable and exciting. I believe that pets can be very helpful and play an important role in our life because of two reasons: first: they can be our friends and help us in difficult situations, second: we can receive positive energy from them. Thus these undeniable reasons drive me to confirm that pets should be treated like family members.

First and foremost: pets are reliable and honest. They are our real friends who don't know how to tell lie and even in many situations they can be very useful for us. There are many examples of their role in our life. For individuals: they can help disables people to do their daily life like crossing the street or bringing things for them. For society: they can be a kind of police force by helping the police in difficult missions and for the families: they can do house works or taking care of babies.

The last but not the least: just like the human, animals have emotions and you can receive their energy very strongly. You can feel this easily if you have animals beside you. For example we have a big aquarium with several beautiful fish in our apartment and every night before sleeping I use to feed and watch them for at least half an hour. Just by doing this simple job, I feel relaxed and comfort during the night.

As a result not only pets can be our best and helpful friends but also they bring happiness for us. So we should treat them as family members.

For the first reason, you may add some reasoning to reach the conclusion that pets should be treated like family members.
As suggested by the prompt, I think the focus should be on the role of pets in family, instead of society. So perhaps you can elaborate on how pets can help and accompany the family.

This first paragraph is good. However, this needs a slight improvement on the flow of the sentence. Let me give a try:
Different people have different perspectives. This is no exception for what people think about companion animals. Nowadays keeping pets and treating them is a common way for some people to use their free time and make their life more enjoyable and exciting. Although some people argue that pets are the best companions, some others always got a lot of pleasure from being with their pets. Therefore, I believe that people should treat these sociable animals like family members.

yes it is better