One sign is constant criticism. In a toxic friend story, you might notice the friend always finding fault with you, like your appearance or choices. Another is jealousy. If the friend is always envious of your success or new relationships, that's a red flag. Also, if they try to control you, for example, telling you who you can or can't be friends with, it's a sign of toxicity.
No, it's not. Devotion is typically a fictional creation that may draw inspiration from various elements but is not directly based on a specific real event or person.
Hard to say. It could be a blend of real and made-up elements. Maybe the author took some real-life experiences and built a fictional narrative around them.
It's hard to say for certain. Sometimes movies draw inspiration from various sources, and Devotion could be a blend of real and fictional elements to create a compelling narrative.
One sign is when they constantly put you down. Like in my story, my friend always made me feel inferior with her comments. Another is being unreliable, like the one who always cancelled plans.