Try not to worry so much.

Keep your head, of course, but rule numero uno: be yourself. I also relate to you and Juliana in that I've never been one to get crushes and whatnot--I only involve myself if it's serious.
Lemme tell you something my mom told me: she said that her husband, my dad, is her best friend. That says a whole lot, I think.
Augh, I wish I could give you more solid advice, but emotions in general (especially love) are quirky, difficult things. At this point all I can say is that you should enjoy having found someone who truly seems to care for you, and let your feelings for him grow without too much anxiety.

GOOD LUCK!!