すでにこのユーザとはトモダチです＞＞＞
[<%= theme_image_tag "mail_outbox.gif" %><%= link_to "トモダチに紹介する", new_message_user_friends_path(:user_id => displayed_user) %>]
[<%= link_to "紹介文", edit_friend_description_user_path(displayed_user) %>]
