麻烦帮翻译英文自我介绍.急晕了

My name is Li Xiaoyan, 19-year-old, I used to be a lively and cheerful character of the girls, but now a bit of silence, and I like the English classes in a daze, because of my English teachers like me a long friends, every time I To the classes seriously, I feel a bit hard, and I do not know how to do.

My name is Lixiaoyan. I am 19years old. Once more I was a lively open and bright girl. But now I am a little silence. I always like being in a daze on the class of Englsih . Because my English teacher looks like a friend of mine. Whenever I want to listen to a lecture carefully I always feel strenuous.I really don't know what I should I do?

My name is Li Xiaoyan.I'm nineteen years old.I'm a vivacious girl before but now I'm silent.I am always in a daze in English class because my English teacher looks like a friend of mine.I want to be serious to attend a lecture but I can't.I want to know what I should do.<