Please help me!?

I have like a guy for more than 3 years, and i haven't told him yet! i seldom speak to him though we used to sms each other often! But, lately things have not been the same and I seriously doubt he even considers me as a friend.. I want to move on with my life. However, I can't move on without telling him how much he means to me, I want to tell him How I feel..It will be like a closure to a chapter. But i don't know whether I should do this or not? What do u people think? Should I tell or not?