i need help he's very important to me....

Well, I think you need to tell him that though you care for him, it's as a bf, not love. I've been through this and know us guys don't enjoy hearing can we be just friends. I can tell you that we do get over it.
I would suggest that you find a way to talk with him and tell him how you feel. I know it will be hard for you because you don't want to hurt him. Just remember, the longer you wait to talk to him, the harder it will be on you. Also waiting to tell him might give him the idea that you have the same feelings that he does.
Just relax and tell him as kindly as possible. There might be an short awkward period while he adjusts. But since you have been good friends for a while, he should come around. I hope this helps. I know it seems hard, but it's part of growing up. Good luck and God bless.