maybe that guy wants to build a friendship or relationship you but he is only shy, the necklace symbolizes a deep infatuation with you.
Sully gave the necklace back to Catherine as a symbol of his true feelings for her.
Harry never gave Ron a necklace; however Lavender Brown gave Ron a necklace in the sixth film, "Harry Potter and the Half-Blood Prince
SWS
Her key necklace that I think her friend gave her.
Well zuko never "gave back" her necklace, Aang stole it back in the episode "the waterbending scroll" and gave it back to her at the very end.
Aleesha marcy
When Jill Duggar and Derick Dillard officially started courting, Derick gave Jill a heart necklace, and now she wears that necklace everyday.
The wardrobe department from the show "Emmerdale" likely gave Bernice her circular necklace. It is unsure of where the wardrobe department would have purchased the necklace from.
Aleesha Marcy is the girl who gave Justin bieber the necklace
The symbol of sister is the necklace, and the things that u gave to your sister.
In HBP Lavender gave a Christmas-present to her boyfriend Ron Weasley: it was a necklace with the text from golden letters Sweetheart; Ron felt ashamed and rejected to wear the necklace :(
I think she wears the necklace that Jaycee Dugard gave her, but for some reason they make her hide it on air.