I've been in a relationship with my current girlfriend for almost a year now, and things seem rough right now because of an issue we're having.

My girlfriend is upset with me because she thinks I don't care about her past trauma. She's told me, very roughly, what she's gone through, and I told her that whenever she's ready to talk about it, I absolutely will. But according to her, the last time she tried to initiate talking about it, I told her that I had no idea what to say. And this upset her and stonewalled the discussion.

I don't doubt that happened. My problem is, is that if she were to try again, I might just very well do the same thing. I have zero idea on how to handle something of this severity. How do I ask her to talk about it? Is that something I should be asking? What does someone even say when given this information? I am not equipped whatsoever to deal with information of this magnitude and I'm at a loss. How do I let her know that I really do care about her, and am 100% willing to listen to what she has to say? I worry I'm too far in the doghouse to even make use of any of this advice, but any help is immensely appreciated

Edit in case anyone was interested: We talked and we're okay :). She told me what she went through and I didn't handle it nearly as bad as I worried I was going to. Thanks everyone for your kind words and helpful advice.