Why did she say to me one time that we are on a friends only basis when...?

I have a best guy friend and I just can't get enough of him. When you have a friend you WILL blow up their phone and all the above. Your just her friend man..seems to me you have more feelings for her then just a friend. But I speculate that she will REALIZE that she does have feelings for you sooner or later and might just end up telling you. Those are the best kinds of relationships. (best friends)