Stiles
Everything had to be absolutely perfect, or at least that's the way Stiles Stilinski thought it should be when he proposed to the love of his life. Derek Hale, the man he fell love with or rather realized he was in love with after a rogue werewolf attacked Stiles but before the rogue could touch him Derek jumped in front of Stiles and defended him from the attack. After the whole ordeal was over Stiles confronted Derek and asked him why he of all people would save him. Derek brushed off the conversation at first but when Stiles pushed harder Derek snapped " Because I love you and I can't bear the thought of living without you" with a twisted expression on his face. To which Stiles took his response as the green light to kiss Derek with passion and confess that he loved him too.
They've been together for more than 2 years now and styles knows that there is no one he would rather spend the rest of his life with than Derek and what better day to pop the question than their upcoming 3 year anniversary?
It was a great plan, a romantic one, the only problem with it was the fact that he wasn't the only one thinking it.