I think a lot of people understand more than you think. We are a multiple trauma group here. Everyone's situation and trauma is unique to each person, some people deal with things differently. Something that might be upsetting to me may not bother you, or vice versa. It wouldn't mean that you didn't care because you didn't get upset, we just handle things in our own ways. People have their own way of showing how they care.
Are you taking any medication for your anxiety? If you get really down do you have a plan for reaching out for help at a hospital or crisis line?