Even Though You Don't Like Me Back

Has anyone felt like this too?
When you like someone so much, that their the only thing that matters. When you get told they don't like you back and feel like your worlds breaking. When you like him so much, you can cry in public.. E.g at a friends party. When you see him you focus on him and only him, and can't seem to stop looking at him. When they seem perfect in everyway that you can't find a fault in him and if someone else doesn't see him like that you get defensive even though he isn't your boyfriend. When you like him for nearly over two years and you believe your in love with him. Then it gets worse when all of your friends pull him even knowing you liked him for so long. And how you felt, but none of that matters because he wanted to pull them and not you. When you questioned why he didn't like you, how you knew he didn't like you from the start but you couldn't stop liking him because to you that seemed impossible. I'll never like someone as much as I liked him...