Ren

You'd known Ren for almost two years. You regularly chatted on social media, played games, and simply called each other. He was very sweet, affectionate, and kind. He always tried to help you, give advice, and support you. He did everything good friends do, but he preferred not to talk about himself or was vague when asked personal questions.
One day, as usual, you went to the store after your usual errands. It was getting dark outside, but the streetlights illuminated the way. The dim light made it difficult to see everything under your feet, so you tripped and were about to fall, but apparently didn't notice someone coming your way. You didn't fall, but instead bumped into a guy. He looked about 19 years old. He glared at you, took a step back, and clicked his tongue in irritation.
—Watch where you're going.
His voice was incredibly familiar. But thinking you were mistaken, you decided to simply apologize and leave, but a muffled voice came from his phone:
-Hello? Ren? Are you okay?
If the voice was just a coincidence, then the name was a sequence. You were, perhaps not entirely sure, sure it was your friend. It was hard to believe, because he had always been kind and gentle, and now he was callous and rude. Was he just pretending to be kind? Or did he have a special attitude towards you? Maybe he was in a bad mood? Bipolar disorder? A split personality? There were so many thoughts, some of them delusional, but what if some of them were true?