Would you prefer to have friends similar to you or different from you?

Friends are able to change our lifestyles. You can eat healthy foods, drink non-alcoholic or alcoholic drinks, do exercise (there's no need to say "do" because the verb "to exercise" already implies an action. Alternatively, most native speakers will say "work out" vs "exercise" because exercise is often used with an object eg exercise your right to do sthg)  or smoke just because of your friends. Some prefer to have friends who are similar to them, while others prefer to have friends different from themselves. I think having both types is necessary.

You need to have friends who are different from you to become familiar with different lifestyles, which you may like but you don't know a lot about them (you don't need to say "you" or "them" here because the subject of the sentence hasn't changed) . For instance, when I was in university in Tehran studying math, I used to spend a plenty (it is either "spend a lot of time" or "spend plenty of time." the first would be more common to say) of time on math. Once that I was at university one of my friends, (to simply the sentence you can say "once, one of my university friends." this works because "once" refers to an event that occurred during the time you were speaking about previously) who did not spend much time on studying his university books (here you can say "spend time studying" without adding university books because it is implied with context) , wanted me to help him with some mathematical problem. I did my best to help him. I solved his problem, and he said to his friends that I solved his problem, so soon there were many people who asked me to solve them their mathematical problems. (I think here it would've been easier for you to have divided the sentences into parts that are sequential to help you progress the story. Example: I did my best to help him by solving his problem. However [this is important because it shows a contraction to the preceding sentence], he told [must be in past tense] his friends this, and soon afterwards I had many people asking me to solve their mathematical problems).I did not have enough time to answer all those questions (you can only use "those questions" if you had specified which questions were asked. Since you did not, and don't need to, you can simply indicate whose questions you are referring to by saying "their questions"), so I was wondering what I should have done (you also have to be mindful that you are using the correct verb tense. Here you should have used the past continuous tense and said" I began wondering what I should do") . I found out that many (of the) questions (no need to say "which") they were asking (or you could say many of their questions" which is simpler and might be more common) were the same, so I chose to answer the common questions, but it was not enough because they wanted me to help them with all questions (it is usually best to avoid starting a sentence with "but." also, if you're going to explain for a reason for something use the word "because"). It was a big problem to solve. How could I help the students who needed to be helped? Finally, I established a math problem solving clas where students could come,  and I and some of my friends (in proper English you should say "my friends and I", which is the correct way in this case, but most of the time people will say "me and my friends" as opposed to "my friends and I"), who were also great at math, helped them with their questions. They had not to pay (" they did not have to pay ") a lot for the classes, so it was a big help for all of us. In those days I did not spend as much time on math as I used to, because I spend a fair amount of time helping others. As you can see, I changed the way I lived because of my friends who did not live like me. 


You also need friends who are similar to you. They can help you make quick, good progress with things that are important for both of you. For example,...........

Would you prefer to have friends similar to you or different from you?

Would you prefer to have friends similar to you or different from you?

Friends are able to change our lifestyles. You can eat healthy foods, drink non-alcoholic or alcoholic drinks, do exercises or smoke just because of your friends. Some prefer to have friends who are similar to them, while others prefer to have friends different from themselves. I think having both types is necessary.

You need to have friends who are different from you to become familiar with different lifestyles, which you may like, but you don't know a lot about. For instance, when I was in university in Tehran studying math. I would spend plenty of time on my studies. One time I was at university and one of my friends who did not spend much time studying his university books wanted me to help him with some mathematical problem. I did my best to help him. I solved his problem, and he told his friends about my assistance. So soon there were many people who asked me to solve their mathematical problems. I did not have enough time to answer all of thier questions, so I wondered what I should do. I found out that many questions made the same inquiry, so I chose to answer the common questions. This was not enough, they wanted me to give them all the answers. It was a big problem to solve, it was, how could I help the students who needed to be helped? Finally, I established a math problem solving class. Students came there, and I with some friends who were great at math, helped them through their questions. They did not pay a lot for the classes, so it was a big help for both of us-me and my friends as well as the students. In those days I did not spend as much time on my personal studies because I spent a fair amount of time helping others. As you can see, I changed the way I lived because one of my friends who did not live like me made me change my lifestyle.


You also need friends who are similar to you. They can help you make quick, good progress with things that are important for both of you. For example,...........rowing a boat.