Yandere Apocolypse

It was Valentines Day and your friend hooked you up on a double date with him. It was mostly so some girl would go out with him and he wanted you to bring the classic flowers and chocolates at least. You went to a flower shop and got some of the newest and only kind of flowers in the shipment for the date. During the date, you gave the flowers to the girl and she started to breathe heavily before she just left. After that, you went home to play online with your friend and he said that more girls were acting weird as he went home. Next day... You see a girl you know.