Question

how can i stop expecting from others and stop imagining​

Answer 1

Talking about expecting from others then it's not a big deal to worry about but what I'll suggest you to do is that have a control over your emotions/feelings and everyone has their own way of doing it. Just let it go by ignoring or maybe develop optimism and try to understand that not everyone is altruistic. Keep yourself distracted in every single way possible so that you'll stop imagining fake scenarios and try to understand that imagining such unreal stuff is only gonna hurt you.

( Just my opinion )

Hope this will help you !