Dilema

So Im having issues here the never ending question of who how and if I should tell people I hang around with online that Im pagan.
I have told a few people who I felt was open to it and they have accepted it without issues. I have even found one that has similar beliefs along the Native American line.
Some of these people no way would understand and I have pictures of the Burning Times even when I think of saying something around one.
Maybe I'm overreacting as I have issues with this person. (parenting skills just being one). So I have decided in order to keep from opening my mouth and possibly creating another "holy war" Ive been leaving the mutual chat room when said person comes in .
At this point I don't care if she notices it or not.