What if you fall in love with your best brother?

The same experience, until I fell in love with my good friend who has been friends for 6 years, I found that there is really no real friendship. Sometimes I chat with him by video and voice, which makes me feel wonderful in such normal communication, even though I didn't tell him that I like him. Now that we are not in a city, we can't understand his interpersonal circle or life track. Sometimes I feel a little hitched when I don't reply to a message. If I don't reply all the time, I will think that he has forgotten something. My best friend said that I have been making excuses. Perhaps, he really doesn't like me, and my little concern may be just the concern between good friends in his eyes. I don't know if I will have the courage to say it in the future. What will happen if I do? I can't predict, so at present, that's all. He is not only my sweetheart, but also my good friend, so this is also good. But it suddenly occurred to me in class today that if he falls in love, I will cry, haha. In short, I still like you, silently, as long as we can talk.