Why I can’t stop thinking about him?

So this guy I’ve been liking since years and to tell you the truth he is a piece of garbage he treated me like shit and used me like if I never meant anything. The beginning of this year he got a girlfriend yet I can’t get him out of my mind. A month ago he blocked me and still it didn’t worked even if I stop watching his social media

Why I can’t stop thinking about him?
Post Opinion