I'm not realy sure that she can, thats why I'm working on it slowly. I get times when I am Mega depressed and I start spewing out, attacking the whole world for the false society that it is. I don't want to drive anyone away when I'm in that kind of mood so I want to introduce her slowly to my world. If she backs me up on the things that I spew about and not take an heavily opposition view that I can't see eye to eye with, then things will work fine and I'll feel free to discuss anything with her when I'm in my darkest moods. I've only known my GF for 4 months. I'm seperated, have been for 18 months - 2 years and I have 2 kids in shared custody 50%. Please read my other post - Serious Advice Needed - In depth Adult live discussion. Its an older post but I still have many issues to deal with in the relationship so just going slow.
Other than that my small group of friends can't handle me when I get way too over the top blurting out how much I hate everything and they turn away.