One of my partner's big issues is that she doesn't feel safe, and that she can't rely on me to keep her safe.

I have some issues of my own that don't help matters (borderline Asperger's syndrome, leading to a feeling of forced disconnectedness from others - argh! ), but that's another story. I'm also not a big guy, so my physical presence doesn't give her much comfort either, although she does like the way I look.

I know I'm asking a pretty basic question, but how do I provide her with a sense of safety? It seems to me that it should be a basic biological instinct that all males possess, but I just can't figure it out. Either I don't react quickly enough, or in an attempt to ensure her safety I appear on edge or flustered, thus making her feel even less safe.

Any tips?