Good Lovely Charm farmspot for Love Token currency in WoD is at Shadowmoon Valley 37,22 underground, Carnivorous Squirrel.
Location video: http://youtu.be/xFxHTwzeI7A
This item can only be acquired during the Love is in the Air holiday. Keeping it in your inventory allows Lovely Charms to drop randomly from mobs when they are killed. You can turn every ten Lovely Charms into a Lovely Charm Bracelet which trades in for Love Tokens at a 1:1 conversion rate.