According to the Merriam-Webster dictionary unrequited love is : not shared or returned by someone else. Well, if you have any questions about the way you feel when your loved one doesn't love you back, read this book.
I almost , just almost, feel sorry for Bracken . I understand that the way he feels is not his fault, together with the serum and his upbringing, it may be understandable to a certain point. However, the way he acts is unforgivable.
Never chase anyone, Bracken, a person who appreciates you will walk with you.