Most Helpful Guy
Yes, I would be pretty angry and annoyed by it.
It's like the girl is keeping a part of her ex with herself at all times. I really don't care what special meaning the necklace has between them. If it's their ex then they should focus on the person they are with and think about they feel because of this necklace.
Maybe it feels harmless to the girl but it would definitely hurt the guy she is dating to know something like that.
Most Helpful Girl
Lol, not okay. :p