Have you ever liked someone but never told them because you knew they liked someone else?

Is it just me, or does it seem like the Love Is Blind UK contestants have been posting about their relationships on social media to spoil the show?
This guy used to give me a lot of attention but now he does not text me anymore. Is it normal that I miss him even when I didn't have a crush on him?
If tomorrow, everyone's "internet personality" (the toxicity, aggression, and insults) became their default personality in real life, how many hours would society last before descending into total chaos?