There's a difference between a boy's left hand ring and his right hand ring. The left hand represents "marriage" and the right hand represents "love". Therefore, rings related to marriage are generally worn on the left hand, and rings related to love are worn on the right hand.
Index Finger:
Left hand - unmarried (already in love, planning to get married);
Right hand - single (not yet in love).
Right hand - love (heart belongs).
Ring finger:
Little finger:
Left hand - never married (divorced/widowed/never married);