When I need to do this type of thing I use output buffering.
if (have_rows('repeater')) {
ob_start();
$display_row_count = 0;
while (have_rows('repeater')) {
the_row();
if (get_sub_field('true_false')) {
$display_row_count++;
// other code
}
} // end while have rows
$content = ob_get_clean();
if ($display_row_count >= 2) {
echo $content;
}
} // end if have rows
