Doctrine entity self reference association with additional information - symfony

Question

I have an entity Client and this entity needs to have an association to another Client with information about relationship. This entity is ClientRelationship.
I need to have this asociation in one property, because I want to use symfony form with collection type field.
Problem is that I do not know how to write it to have that association in one Client property.
Now I have in Client two asociation properties, but that is my problem. In form on one side is relationship visible, but on other Client its not.
Client entity:
/**
* #ORM\OneToMany(targetEntity="ClientRelationship", mappedBy="leftClient", cascade={"persist", "remove"})
*/
private $leftRelationships;
/**
* #ORM\OneToMany(targetEntity="ClientRelationship", mappedBy="rightClient")
*/
private $rightRelationships;
ClientRelationship entity:
/**
* #ORM\Column(type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #ORM\Column(type="string", length = 255)
* #Assert\Length(max = 255)
* #Assert\NotBlank()
*/
private $relationship;
/**
* #ORM\ManyToOne(targetEntity="Client", inversedBy="leftRelationships")
* #ORM\JoinColumn(name="leftClient_id", referencedColumnName="id")
*/
private $leftClient;
/**
* #ORM\ManyToOne(targetEntity="Client", inversedBy="rightRelationships")
* #ORM\JoinColumn(name="rightClient_id", referencedColumnName="id")
*/
private $rightClient;
EDIT: added forms
ClientType form:
$builder->add('leftRelationships', 'bootstrap_collection', array(
'type' => new ClientRelationshipType(),
'label' => 'relationships',
'allow_delete' => true,
'allow_add' => true,
'by_reference' => false,
'add_button_text' => 'add',
'delete_button_text' => 'remove',
'options' => array(
'businessCase' => $options['businessCase'],
'client' => $options['client'],
),
));
ClientRelationshipType form:
$builder->add('rightClient', 'entity', array(
'label' => 'client',
'class' => 'MyProject\CoreBundle\Entity\Client',
'property' => 'name',
'query_builder' => function (ClientRepository $er) use ($options) {
$qb = $er->createQueryBuilder('c');
if ($options['businessCase'] instanceof BusinessCase) {
$qb->andWhere($qb->expr()->in('c.id', ':clients'));
$qb->setParameter(':clients', $options['businessCase']->getClients()->toArray());
}
if ($options['client'] instanceof Client) {
$qb->andWhere($qb->expr()->neq('c.id', ':client'));
$qb->setParameter(':client', $options['client']);
}
return $qb;
},
));
$builder->add('relationship', 'text', array(
'label' => 'relationship',
));