The court determines custody in accordance with the best interests of the child, considering all relevant factors including, but not limited to: the wishes of the child's parent or parents, the wishes of the child as to his custodian, the interaction and interrelationship of the child with his parents, his siblings and any other involved person, the child's adjustment to his home, school and community, and the mental and physical health of all individuals involved. The court considers the wishes of minors 14 years of age or older.