Twitter Help

I'm looking for some help from someone who has used the Twitter API, basically i just want to check if i follow a certain user, i have the code set p to log in to my website and auth the user etc i just cant get the check to work correctly.

if(isset($_GET['oauth_token']) || (isset($_COOKIE['oauth_token']) && isset($_COOKIE['oauth_token_secret'])))
{
// user accepted access
if( !isset($_COOKIE['oauth_token']) || !isset($_COOKIE['oauth_token_secret']) )
{
	// user comes from twitter
    $Twitter->setToken($_GET['oauth_token']);
	$token = $Twitter->getAccessToken();
	setcookie('oauth_token', $token->oauth_token);
	setcookie('oauth_token_secret', $token->oauth_token_secret);
	$Twitter->setToken($token->oauth_token, $token->oauth_token_secret);

}
else
{
 // user switched pages and came back or got here directly, stilled logged in
 $Twitter->setToken($_COOKIE['oauth_token'],$_COOKIE['oauth_token_secret']);
}

    $user= $Twitter->get_accountVerify_credentials();
echo "
<p>
Logged in to Twitter as: 
<strong>{$user->screen_name}</strong><br />

</p>";

//check if i follow someone
$follows = $Twitter->get('friendships/exists', array('user_a' => $_SESSION['username'], 'user_b' => 'USERB'));
if($follows){
    echo 'You are following USERB ';
}

}

I've tried a few different ways but can't seem to get this working.