The Last Day by Seann Barbour

It's the morning after Ronald Lawrence's high school reunion. He's woken up next to an old crush, listened to her speech about how this was a one-time thing, and now he's stopping for coffee before he leaves this town and his more successful peers and heads back to his own life of mediocrity. Then a man with yellow eyes beats him to death. It's the morning after Ronald Lawrence's high school reunion, and he had the weirdest dream last night. He dreamed he was attacked by a giggling maniac with yellow eyes, after he woke up to his old school crush's speech about this being a one-time thing—the same speech she's giving him right now. A plague of homicidal insanity is spreading across the world. It's the end of civilization, and Ron is reliving it over and over again. Always they catch him. Always they kill him. Always he wakes back up in that hotel room, next to his old school crush. It's the morning after Ronald Lawrence's high school reunion. Forever.