I voted "yes, moderately," because I think "severe" overstates what I experience. In truth, I think it's someplace in between.

Before the ptsd symptoms kicked in hard a few years ago, I used to actually look forward a bit to having the house to myself when my husband makes the rare overnight trip away. Now I have a very difficult time with it. My anxiety goes way up. I don't feel safe being alone. I sleep (when I can) on the couch with our animals around me. Plus I'd rather be on the main floor, where I can monitor the doors, than in our upstairs back bedroom. In general, I feel quite restless and agitated when he's gone, even for a few hours.