以下是介绍自己的同学的五句话：

1. My classmate's name is Lily. She is a very friendly and helpful person.

2. Lily is good at English and always helps me with my homework.

3. She also loves reading books and often recommends great ones to me.

4. In addition to her academic strengths, Lily is also very athletic and enjoys playing basketball.

5. Overall, I am grateful to have Lily as my classmate and friend.