how to check if given page is active page

by

Use get_the_ID() before you start the loop, then compare:

$original_id = is_singular() ? get_the_ID() : 0;

$args = array('post_type' => 'services');
$services = new WP_Query( $args );
$cnt = 0;
if( $services->have_posts() ) {
    while( $services->have_posts() ) {
    $services->the_post();
    if ( get_the_ID() === $original_id )
        echo 'This is me!';