"It's Not Fair!"

"My sister gets everything she wants," laments one youth. "But when it comes to me, I get left out completely." Sound familiar? But note those 2 absolutes, "everything" and "completely" Is this situation really that dire? Not likely. And even if it is, is it realistic to expect absolutely equal treatment for 2 different individuals? Of course not! Your parents may simply be responding to your individual needs and temperaments.
But isn't it unfair for parents to favor a particular child? Not necessarily. Recall how Jacob favored his son Joseph. The reason? Joseph was the son of Jacobs beloved wife Rachael, who had died. Is it not perfectly understandable that Jacob felt especially close to this son? Jacob's love for Joseph, however, did not exclude his other sons, as he expressed real concern for their welfare. Their jealousy of Joseph was thus unfounded!
Your parents may similarly be drawn to your brother or to your sister, perhaps because of shared interests, similar personality, or other factors. This does not mean that they do not love you. If you feel resentment or jealousy, realize that your imperfect heart has simply got the better of you. Work to overcome such feelings. As long as your needs are met, why become disturbed if your sibling seems to get extra attention?