Why do some people brag about rejecting a proposal, and is it really as satisfying as it sounds?

I don't feel good anymore. My life is not going well. I want a new start in my life. I wanna leave everything behind and move without telling anyone. What should I do?
Why do people get temporary crushes on social media personalities even if they've never talked to them?
What's more motivating in a relationship: overcoming challenges together or finding success individually for each other?