BuddyPress.org

@emmanuel1234, I did the exact same thing on my site but I took it a step further. For example, if the user is a man who is looking for a woman, then the directory will only show women who are looking for men, not just all women (some women might be looking for other women etc.).

Step 1: The below code is in my bp_custom.php where field #193 is the user’s gender and field #197 is the gender the user is looking for. Replace them with your field IDs.

function get_desired_users () {
		global $wpdb;
		$my_user_id = bp_loggedin_user_id();
		$my_gender = $wpdb->get_var("SELECT value FROM {$wpdb->prefix}bp_xprofile_data WHERE field_id = 193 AND user_id = $my_user_id");
		$i_am_looking_for = $wpdb->get_var("SELECT value FROM {$wpdb->prefix}bp_xprofile_data WHERE field_id = 197 AND user_id = $my_user_id");
	
		//Get all users that are what the logged_in member is looking for
		 $my_matches = $wpdb->get_col("SELECT user_id FROM {$wpdb->prefix}bp_xprofile_data WHERE field_id = 193 AND value = '$i_am_looking_for' AND user_id IN (SELECT user_id FROM {$wpdb->prefix}bp_xprofile_data WHERE field_id = 197 AND value = '$my_gender')");
		 
		$include = implode(",", $my_matches);
      	        return $include;
}

Then in your members_loop page, in the bp_ajax_querystring line add the function that returns the user IDs like so:
<?php if ( bp_has_members( bp_ajax_querystring( 'members' ) .'&include=' .get_desired_users() ) ) : ?>

That works like a charm for me.

Give this a try. I didn’t validate it but it should work. Let me know.
Field #2 is the birthday field.

function get_desired_users () {
		global $wpdb;
		$my_user_id = bp_loggedin_user_id();
		$my_gender = $wpdb->get_var("SELECT value FROM {$wpdb->prefix}bp_xprofile_data WHERE field_id = 193 AND user_id = $my_user_id");
		$i_am_looking_for = $wpdb->get_var("SELECT value FROM {$wpdb->prefix}bp_xprofile_data WHERE field_id = 197 AND user_id = $my_user_id");
	        $my_birthday = $wpdb->get_var("SELECT value FROM {$wpdb->prefix}bp_xprofile_data WHERE field_id = 2 AND user_id = $my_user_id");
                $five_years_older = date("Y-m-d H:i:s", strtotime("-5 years", strtotime($my_birthday)));

		//Get all users that are what the logged_in member is looking for
		 $my_matches = $wpdb->get_col("SELECT user_id FROM {$wpdb->prefix}bp_xprofile_data WHERE field_id = 193 AND value = '$i_am_looking_for' AND user_id IN (SELECT user_id FROM {$wpdb->prefix}bp_xprofile_data WHERE field_id = 197 AND value = '$my_gender') AND user_id IN (SELECT user_id FROM {$wpdb->prefix}bp_xprofile_data WHERE field_id = 2 AND value BETWEEN '$five_years_older' AND '$my_birthday')");
		 
		$include = implode(",", $my_matches);
      	        return $include;
}