Need some support

So, long story short, I had this huge crush on one of my friends. And he basically said to me "You know, I think the world would be better off if you didn't exist." And this hit extremely hard on my heart. I feel so down and alone. It's like ever since he said that, In my mind, I've been trapped in a labyrinth where every corner there's that same message in different voices. I can't take this anymore