Has he ever done anything which might suggest that he likes you in the same way that you like him?
There are alot of pros and cons either way.
I dont know what kind of friendship you have but, how do you think he would react if you told him and he didnt feel the same? Do you think that would be worse than keeping things how they are and having to just hide your feelings?
You say that youre always honest with each other...does that include about how you feel towards each other, or has this never been an issue before?
Sorry for all the questions, you dont have to answer anything you dont want to!