I have a boyfriend and we are in 8 years now. We are happy and enjoyed each other together. But as time goes by I realize that my feeling for him has changed. I know he loves me so much but i dont feel the same way. I dont love him anymore. How can i tell him that i want to broke up with him without getting  him hurt?

There is no really other way to tell him that you dont love him anymore without hurting him. You just better tell him what you really feel because that is good than not to confess. You have no fault for not loving him anymore because you have not controlling on what you feel. Before confessing to him ask your self a hundred times or a thousand time if you dont have any feelings for him then if you got the right answer tell him. I think he will understand what you really feel I know it hurts for him but when the time has come he can move on. Youre not wrong to your decision unless you have another man when you still together.

Girl, there's no such thing as breaking up with someone without hurting them. Unless he don't love you anymore as well. But you said you know he loves you that much, so I can't think of a way to tell you how to end it without hurting him, because he will.
I can only suggest you to think about it many times, and if you think you are ready to see him loving another woman. Then end it, there's no reason to stay, you'll just hurt him even more if you keep on lying about your feelings for him.