英语写作a selfish friend 写一篇100字左右的英语作文

I have a good friend .His (Her) name is *** .He (She) is tall and handsome(beautiful).But selfish is his (her) disadvantage .I remember that there is one thing i know this .
A week ago ,when we did our homework together.I met a difficult topic and i know he can do that .So i need some help from him .i said "can you tell me how to do this "but he said nothing .i was disappionted .i really feel that he is a selfish person .A friend in need is a friend indeed.