I will be happy with either way. I hope they create a love triangle between those 3. Whoever it is, i hope that girl will make Stiles happy. He's been alone for a loong time, and he deserves some BIG love.
Will Lydia and Stiles be more then a friends or Cora will win Stiles's heart, i don't care. All i care, is for Stiles to be happy! He deserved it!