真心朋友英语

I just need a sincere friend and a boy who understands me well.

Exectly, there have been already few friends indeed.已经没有 there have been already确实exactlyfriends indeed真心朋友

I need only a real-heart friend and a boy who understand me .

中文原文：我只是需要一个真心朋友和一个能懂我的男孩；英语表达：I just need a true friend and a boy who can understand me；

a friend in need is a friend indeed 用这个比较贴近英语表达习惯

Having a true friend is better than having many companions.或者 A sincere friend is better than a lot of fair-weather friends.英文中有一个谚语患难见真情A friend in need is a friend indeed.跟这个意思差不多有不会的再问我O(∩_∩)O哈！