Having trouble showing more blog posts on my grid blog layout

I made a grid blog layout on my wordpress site and i got some help from a friend with some code. It shows 3 posts per row but it wont go past 2 rows so its only showing 6 posts when there is much more. I know I need to expand on my code to allow this but I'm not really sure how. Here is what I have currently for my single.php file

?php get_header(); ?   

    div class="page-header"
        div class="container"
        /div
    /div
div class="page-header2"
h1 - Remodeling 101 - /h1
/div
div class="blog-bg"
  div class="container"

    div class="row"

    ?php
    $the_query = new WP_Query("showposts=6orderby=date");
    $i = 0;
    while ( $the_query -have_posts() ) {$the_query -the_post(); $i++;
        if ($i == 1){echo "div class=row";}
        ?
        div class="col-md-4"
            article class="post"

                ?php if ( has_post_thumbnail() ): ?
                    ?php echo the_post_thumbnail();?
                ?php endif;?

                h2a href="?php the_permalink(); ?"?php the_title(); ?/a/h2
                hr
                div class="blog-desc"
                    p
                        on ?php echo the_time('l, F jS, Y');?
                        a href="?php comments_link(); ?"/a
                    /p
                    ?php the_excerpt(); ?
                /div
            /article
        /div
        ?php
        if ($i == 3){echo "/divdiv class=row";}
        if ($i == 6){echo "/div";}


    }
    wp_reset_postdata();
    ?


    /div

  /div
/div

?php get_footer(); ?