Well, I can tell you one thing, you're not the only one; I've been having dreams like that about my best friend Daniel and as much as i'd like these dreams to come true, I can only see him as a friend. He's been my bestfriend for 3 years now. He knows that I have a thing for him, he's fine with it, and he feels the same about me too but he's married... (no, he's not unfaithful) Our relationship is just like yours and your bestfriend's. Just take it easy, think things through and just hope for the best. Talk to him about it as best you can because you never know if he feels the same about you. Goodluck!!!