Happy "Love is in the Air"... sounds a bit stupid but if this is the name Blizzard choose for this event so be it

Like i did with other world events I'll try to mane a Guide for this event also. I'll explain exactly how I did these achievements and in the same order i completed them.
This year a lot about this event was changed and i hope to get it right.
Dangerous Love - You'll have to complete one of the
Crushing the Crown quests.
Lonely? - Join someone or use your own
Romantic Picnic Basket in Dalaran and then eat a
Buttermilk Delight (you'll find that inside
Box of Chocolates).
Sweet Tooth - Another achievement that will get you fat. You have to eat 4 type of candies found inside
Box of Chocolates. You'll get that box by completing seasonal quests.
Shafted! - Use
Silver Shafted Arrow on 10 players. You can buy those from any
Lovely Merchant.
Flirt With Disaster /
Flirt With Disaster - First of, buy some alcohol and get completely smashed. Use a
Perfume Bottle (buy it from any innkeeper) and throw a
Handful of Rose Petals Sraaz (for Alliance) /
Jeremiah Payson (for Horde) and then /kiss him. Lovely, right?
The Rocket's Pink Glare - You'll need 10 XXXX for this. Just use 10 of those in 20 sec or less.
Fistful of Love - Pretty much like any other achievement where you have to "farm" Dalaran for different class/race combinations. This time you'll have to use
Handful of Rose Petals on players. You can buy those from any event merchant with one
Love Token.
Nation of Adoration /
Nation of Adoration - You'll have to complete a series of
quests to get this achievement. You'll need 40
Lovely Charms to create 4
Lovely Charm Bracelet. You'll have to get
Charm Collector's Kit from any Peddlefeet located near any major city leader.
Charming - You'll need 120
Lovely Charms to create those 12
Lovely Charm Bracelet. You'll have to get
Charm Collector's Kit from any Peddlefeet located near any major city leader. A great way to farm those charms is to grab a vehicle in Ulduar and kill as many mobs as you can.
I Pitied The Fool -
Love Fool can be purchased from any Lovely Merchant this year. You'll have to use that in the requested areas and /pity the dummy. Is not necessarily to be YOUR fool to get the achievement.
My Love is Like a Red, Red Rose - You'll need
Bouquet of Red Roses OR
Bouquet of Ebon Roses. I got mine from Maiden of Grief in Halls of Stone lat year. If I remember correctly other dungeon bosses drop the needed item also.
Perma-Peddle - You must obtain the
Peddlefeet pet. This year you'll be able to buy it with
Love Token from any Lovely Merchant.
Lovely Luck Is On Your Side -
Lovely Black Dress was obtainable randomly lat year. Now you can pick it from a
Lovely Dress Box. You can buy that box from any Lovely Merchant.
Be Mine! - This year will be much more easy to get this. You just have to buy a
Bag of Candies from any event merchant and eat 8/10 random generated candies.
Big Love Rocket - This year this is a Feat of Strength. You have to obtain the
Big Love Rocket from Apothecary Hummel (Shadowfang Keep).
Tough Love - You have to complete the quest
You've Been Served (Shadowfang Keep). It should be something like Bewfest boss. Maybe this one will drop the
Pink Rocket Mount...
Lovely Merchants Items
Notice: A lot of these infos are going to be updated when the event will start since a lot of changes were made this year for this event.