Hi,
Are they all correct?
(a) I have many friends. Among them, Christ is my best friend. ok
(b) We have been friends for four years. I like him because he is always with me.
(c) If we have problems with our homework, we will help each other. ok
(d) Now, I am like his English teacher tutor. Say either 'teacher' or 'tutor', but not both.
(e) We share the same hobby too, which is reading.
(f) We often go to the public library which is near my house to borrow some storybooks. ok. 'Novels' is a better word to use.
(g) I’m very thankful to have such a good friend as Susan. Or to have such a good friend like Susan
Best wishes, Clive