Guys can't just be friends with women. See When Harry Met Sally and the video below. It's true. He either is not interested, or he needs to grow a pair and step up. Best advice on here is to have a heart to heart with him and you will know for sure.
Another piece of wisdom about men: you need to hit us over the head with a board about stuff sometimes. We are simple, stupid creatures. Subtlety doesn't always work.
Why Men and Women Cant be friends - YouTube