对于关于朋友的英语作文的结尾，可以用以下方式来写：
In conclusion, friends are an essential part of our lives. They provide emotional support, share our joys and sorrows, and make life more meaningful. It is important to cherish and nurture these friendships, as they play a significant role in our happiness and well-being. Remember to be a good friend to others and always be there for them. True friends are hard to come by, so treasure the friendships you have.
总之，朋友是我们生活中不可或缺的一部分。
他们提供情感上的支持，与我们分享喜怒哀乐，使生活更有意义。
重要的是要珍惜和培养这些友谊，因为它们对我们的幸福和福祉起着重要作用。
记得要成为他人的好朋友，始终在他们身边。
真正的朋友难以找到，所以要珍惜你拥有的友谊。