A good friend can need't popular in school and can need't good at sports or makes me laugh,but she must have a kind and

A good friend can need't popular in school and can need't good at sports or makes me laugh,but she must have a kind and honest heart.
这句话有没有语病..有请指出改正...
顺便翻译一下...
can need’t 我想表达“不一定”，“可以不需要”的意思...
但感觉可能不对...