By guide completely this is the most anyone can do without writing the code for you.
Gather the POST variables from your form.
$name = $_POST['name']
$message = $_POST['message']
Prepare the Email
$to = "firstname.lastname@example.org"
$subject = "Someone Likes you enough to send you a message"
$message = "You have a new message from". $name "<br /><br />". $message
$headers = 'From: Facebook@example.com' . "\r\n" .
'Reply-To: email@example.com' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
mail($to, $subject, $message, $headers)
If you cant get it to work with that abstract then make a charitable donation to my NFL Sunday Beer fund and ill write your code.