Maybe it would be better to confront your fears, and not let them put you into a smaller and smaller world. I know I'm not one to talk, but I'm just saying that would be the standard suggestion from therapists. Of course, you wouldn't just immerse yourself in violent TV and whatnot--that might work for some, but in general, you get someone to give you slightly more aggressive scenes than you're used to, until you can handle it. And no, it doesn't make you insensitive to real violence.