My classmate is Jantima, she is from Thailandia, but she has been living in New York for 1 year. Jantima has a nickname Beau. Actually She lives in Queens but she works in Manhattan. Beau is studying Enfglish in Laguardia, because she always is with her friends, but they only speak in Thai. A Beau's friend spook about Laguardia, therefore she knew this school. Beau is happy living in New York because she finds many friends, different cultures, great places as Central Park. Beau has many pictures in her Iphone about parks, bridges, streets,  and sceneries. When Beau speaks about New York she always has a smile in her face.

I think really Beau is happy in New York! She has not family people here, but Beau has many friends, specially from Thai and Latinos, therefore she can to learn some words in Spanish.

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correction:

My classmate is Jantima, she is from Thailandia, but she has been living in New York for 1 year. 

-My classmate is Jantima. She is from Thailand, but she has been living in New York for 1 year. (separate sentences by periods (.)

Jantima has a nickname Beau. 

-Jantima has a nickname: Beau. 

Actually She lives in Queens but she works in Manhattan. 

-At present, she lives in Queens, but she works in Manhattan. 

Beau is studying Enfglish in Laguardia, because she always is with her friends, but they only speak in Thai. (correct)

A Beau's friend spook about Laguardia, therefore she knew this school. 

A friend of Beau's spoke about Laguardia. Therefore, she knew this school. 

Beau is happy living in New York because she finds many friends, different cultures, great places as Central Park. 

-Beau is happy living in New York because she finds many friends, different cultures and great places, such as Central Park.

Beau has many pictures in her Iphone about parks, bridges, streets,  and sceneries. 

-Beau has many pictures on her iPhone about parks, bridges, streets and scenery ("scenery" is uncountable)

When Beau speaks about New York she always has a smile in her face.

-When Beau speaks about New York, she always has a smile on her face. 

I think really Beau is happy in New York! (correct) 

She has not family people here, but Beau has many friends, specially from Thai and Latinos, therefore she can to learn some words in Spanish.

-She has no people in her family here, but Beau has many friends, especially from Thailand and Latin America. Therefore, she can learn some words in Spanish.