Hi,
Please use the following code in bp-custom.php

/**
 * Disable add friends button fro admin users
 *
 * it is an example and not recommended. It can cause n extra queries due to capability checking on the members loop.
 *
 * @param $button
 *
 * @return mixed
 */
function buddydev_hide_admin_friends_button( $button ) {

	if( ! isset( $button['id'] ) || $button['id'] != 'not_friends' ) {
		return $button;
	}

	$user_id = absint( str_replace( 'friend-','', $button['link_id'] ) );
	if ( ! $user_id ) {
		return $button ;
	}

	//we can check using is_super_admin( $user_id ) || user_can( $user_id, 'cap' )

	if ( user_can( $user_id, 'manage_options' ) ) {
		$button['id'] = false;
	}

	return $button;
}
add_filter( 'bp_get_add_friend_button', 'buddydev_hide_admin_friends_button' );

Please do note that it will cause n extra queries on the members loop.

Regards
Brajesh

You are most welcome!