function check_if_displayed_user_is_friend()
{
    $is_friend = friends_check_friendship(bp_loggedin_user_id(), bp_displayed_user_id());

    if ($is_friend) {
        echo '

        <style>
             #item-header-avatar {-webkit-filter: blur(0px !important);
                -moz-filter: blur(0px !important);
                -o-filter: blur(0px !important);
                -ms-filter: blur(0px !important);
                filter: blur(0px !important);
                }
                #gallery-carousel .circle {
                -webkit-filter: blur(0px !important);
                -moz-filter: blur(0px !important);
                -o-filter: blur(0px !important);
                -ms-filter: blur(0px !important);
                filter: blur(0px !important);
                }
            .rtmedia-container #rtmedia-single-media-container img {
                -webkit-filter: blur(0px !important);
                -moz-filter: blur(0px !important);
                -o-filter: blur(0px !important);
                -ms-filter: blur(0px !important);
                filter: blur(0px !important);
                }
                img.avatar {-webkit-filter: blur(0px !important);
                -moz-filter: blur(0px !important);
                -o-filter: blur(0px !important);
                -ms-filter: blur(0px !important);
                filter: blur(0px !important);
                }
        </style>

        ';
    }

}
add_action('wp_head', 'check_if_displayed_user_is_friend');