He left the friend zone and its freaking me out! 😮

My best guy friend has been by my side through everything since I was a kid. Now I'm in my late twenties and he's still a friend, but it feels like it's growing into more and its freaking me out! He's sweet, supportive, funny, and I can tell him anything...unlike the men I've dated who have done some real emotional damage. The closeness I feel has taken me by surprise and I don't know what to make of it. Am I being silly and could this be the beginning of something good?