I'm using a house rule for force sensitive player. I give him ten force tokens at the beginning of the session. Five dark side and five Light side tokens (Many thank's for the Beginners Game boxes ). We call it The Balance. Each time he act "like a jedi"[sic] he can flip one dark side token to light side and vica versa. At the end of the session, if he has more dark side tokens than light side tokens, then he lost Morality (we called it Destiny, but we change it Morality now) and if he has more light side tokens than dark side tokens he earn Morality.
The detection part. If i'm curious about that two force sensitive character are sense each other, then I throw secretly a sense or disciple check both of them and I add five minus the difference of they The Balance ratio difficulty. The thing is, if they are the different side of the Force, then they detect each other easier. The rest is always narrative.