Accept friendship button isn't showing up

<div class="page-header">
    <h1>Viewing Friendship</h1>
</div>

<% if @user_friendship.requested? %>
    <h3>Do you really want to be friends with <%= @friend.first_name %>?</h3>
<% end %>

<div class="form-actions">
    <% if @user_friendship.requested? %>
        <% form_for @user_friendship, url: accept_user_friendship_path(@user_friendship), method: :put do |form| %>
            <%= submit_tag "Accept Friendship", class: 'btn btn-primary' %>
        <% end %>
    <% end %>
</div>

class UserFriendshipsController < ApplicationController
    before_filter :authenticate_user!

    def index
        @user_friendships = current_user.user_friendships.all
    end

    def new
        if params[:friend_id]
            @friend = User.where(profile_name: params[:friend_id]).first
            raise ActiveRecord::RecordNotFound if @friend.nil?
            @user_friendship = current_user.user_friendships.new(friend: @friend)
        else
      flash[:error] = "Friend required"
        end

      rescue ActiveRecord::RecordNotFound
          render file: 'public/404', status: :not_found
    end

    def create
        if params["user_friendship"] && params[:user_friendship].has_key?(:friend_id)
            @friend = User.where(profile_name: params[:user_friendship][:friend_id]).first
            @user_friendship = UserFriendship.request(current_user, @friend)
            if @user_friendship.new_record?
                flash[:error] = "There was a problem creating that friend request."
            else
                flash[:success] = "Friend request sent."
            end
            redirect_to profile_path(@friend)
        else
            flash[:error] = "Friend required"
            redirect_to root_path
        end
    end

    def accept
        @user_friendship = current_user.user_friendships.find(params[:id])
        if @user_friendship.accept!
            flash[:success] = "You are now friends with #{@user_friendship.friend.first_name}"
        else
            flash[:error] = "That friendship could not be accepted."
        end
        redirect_to user_friendships_path
    end

    def edit
        @user_friendship = current_user.user_friendships.find(params[:id])
        @friend = @user_friendship.friend
    end
end