Everything she said felt superficial might be just how you were able to take it in at that moment. She may have been 100% sincere, and a bit reserved, to give you room to say more, to say as much as you wanted to say, without possibly diverting your thoughts with a stronger response from her.

The best advice is to go back and keep talking about it. You may have to talk about it several times, but what happens between the two of you is real and is important to talk more about.

And the more you talk about the things you told her, the better she will be able to understand and empathize. I don't think we have to personally experience something to be able to understand and feel the other's pain, but this is something she struggles with evidently. I hope you can find a place with her and about this that you can feel more comfortable. If you don't go back, you won't have that chance to move beyond feeling disappointed, disillusioned, and unfelt.