Im a cancer sun leo rising. And I've dated a cancer boy. Im a girl. To me, cancer boys and girls should remain friends unless they both have the will power to try in that relationship. If you were to date him, you will find your world with him turned upside down. How comfortable you feel with him now, as a friend, will be completly lost for a while. When I dated my cancer boy I was very happy go lucky about it cos he was such a great friend. I could tell him basically anything and he did the same, but hes a boy so they hide their emotions regularly. But once we dated, there was an awkward distance. It was just strange. What he says to you ' I couldn't date myself' speaks louder than the actual words. Thats kinda what it is. I dont know, maybe if you keep up this best friend deal you got going, he'll realize how comfortable he is with you. It could work if both really want it.