You can add the bloglovin quite easy, if you edit the simple-social-icon.php file look for line 138:
'youtube' => array(
'label' => __( 'YouTube URI', 'ssiw' ),
'pattern' => '<li class="social-youtube"><a href="%s" %s></a></li>',
),
after this simple add this code:
'bloglovin' => array(
'label' => __( 'Bloglovin', 'ssiw' ),
'pattern' => '<li class="social-bloglovin"><a href="%s" %s><strong>+</strong></a></li>',
),
Then under the widget settings you now have a field for bloglovin. Hope that helps.