Hi Guys!

I feel desperate right now. Whenever i don't like someone, i start to become obsess with them. I can't stop thinking about them. I start to try to find flaw or mistakes so i can feel better but usually it will be temporary because i still think I'm losing, I'm worthless or it's unfair.
I'm not sure how to stop that.
I knew that's not good for me.
I really want to stop and start thinking something nicer instead thinking about people that I hate and wishing them to fail.
I know that i'm suppose to focus on something else.
I just don't know how.