I am a very lonely person, after you leave I never smile.

我本身是个很孤单的人，你离开以后我就再没笑过。

youdao

I am a very lonely person, feel blue occasionally boundlessly, the ends of the earth, endless, full to the brim loneliness.

我是一个很寂寞的人，心情不好时有无边无际的，天涯海角的，一望无际的，满满当当的寂寞。

youdao

I am a very lonely at the time the children will look up to the sky, watching the sun, watching the big moon, hope to see the eyes of the neck pain, choking with tears.

我是一个在感到寂寞的时候就会仰望天空的小孩，望着那个大太阳，望着那个大月亮，望到脖子酸痛，望到眼中呛满泪水。

youdao