Define Orientation

Aislinn Conner has two friends.
James Mathews and Rachael Kyler.
When they were in sixth grade they had agreed to find one person each to invite to their table.
Note that no one has ever agreed to join them.
When they invite two new kids, Sierra Reilly and Garrett Patterson, will they stay or leave?
What will happen to their friendship during eighth grade?
Will bisexual Aislinn fall in love with Sierra?
Will bisexual James crush over Garrett?