I need help. I'm struggling at the moment with extreme lack of empathy and egocentrism. 

My boyfriend has had a rough couple of days and as a result has been quite low. Instead of just giving him his space I've felt frustrated at him for not getting over it and obsessing about how his bad mood is impacting on me. He told me what is going through his mind and it was revisiting awful histroic trauma. As a result, his OCD and aggressive responses are flaring up.

Even when he explained this to me I didn't really feel anything. Just frustrated about how hard it was for _me_ and how _I_ felt in the situation.

I know this is not healthy, and I want it to stop because I feel like a monster. He is so kind and loving and sweet to me. Right now he needs me to most and I feel out of control unreasonable.

Does anyone have any suggestions or articles I can read to help?