Small Fragments of Life

In these days, our pace of life is so fast; people feel tired easily.
One day, I got a call from my best friend--she told me that she was tired and not happy because she must work hard. What's more, she met some person who knew little about her and always misunderstood her. So she said that she missed me and the times when we were in high school.
She also said that time flew, to do good things that you want to do while you are young and until you get older, and that they must be good memories. She suggested to me that now I need to do things that cherish time and leave good memories for myself.

Good job on this :) It seems your main problem however is the use of punctuation. Don't forget your capital letters, and there is never a space at the end of a sentence before any punctuation, but after it. Eg:

The apple, which looked crunchy, had fallen on the ground.

Do you notice the space after each comma? The space is not before the comma.

Eg 2:

I bent down to look at the apple. It was dirty.

In this example, do you see how there is a space after the full stop? Then the next sentence begins with a capital letter.

But overall, nice job! Good luck :)