I tell my students you have an absolute right to write about people you know and love. You do. But the kicker is you have a responsibility to make the characters large enough that you will not have sinned against them.
I don't have a bad relationship. I'm 48 years old. I think life is too short for that. To me, life is... you open the shutters, you see the dogs outside, you look left, you look right, in, what, a second and a half? And that's a life.