I don't share boys

When is it ok to share with friends?
a) a random boy who I like
b) a boy who I've kissed
c) a boy who I've dated
d) a previous boyfriend

I can understand if some time has passed with the boy, but what if the wounds are recent? I don't think I'm willing to stay friends with a girl who might stab me in the back. It's not worth it. The story is more complicated, but I'm not going into details on this one since she may read this. Let's just say that it's the straw the broke the camel's back. It's sad to lose a friendship, but the situation makes me an angry sMhyla, not a pretty sight.