My parents are divorced now.  It makes me sad
Do you have separation anxiety from it? Anxiety is the worst.
Anxiety is definitely bad.  It is hard to deal with
You must worry about the future and have fearful reactions to events.
Yes it is hard to not worry about what the future holds
Are your thoughts negative and repetitive and uncontrollable?
Yes.  I am constantly worrying about what is going to happen.
Firewing
Firewing is a children's book written by the Canadian author, Kenneth Oppel. It is the third book in the series which also consists of: "Silverwing", "Sunwing" and the prequel "Darkwing".
Plot.
Griffin Silverwing is the son of the Silverwing Shade and the Brightwing Marina. Slower and more clumsy than non-hybrids, Griffin's only real friend is Luna, a popular newborn. Fearing rejection by his father, Griffin steals fire from human campers to show his bravery.
Anxiety disorder
Anxiety disorders are a group of mental disorders characterized by significant feelings of anxiety and fear. Anxiety is a worry about future events, and fear is a reaction to current events. These feelings may cause physical symptoms, such as a fast heart rate and shakiness. There are several anxiety disorders, including generalized anxiety disorder, specific phobia, social anxiety disorder, separation anxiety disorder, agoraphobia, panic disorder, and selective mutism. The disorder differs by what results in the symptoms. People often have more than one