Why am I lacking the compassion I used to have?

Lately I've been feeling very down. I rarely leave the house because of paranoia, and I no longer support many of the minority groups I used to. It's not that I'm against them, I'm just no longer in favor of helping them anymore, and I'm unsure why. I used to CARE whether or not I offended others. I used to care whether or not people got left behind. I used to care about saving drug addicts. I couldn't care less about them anymore. It's not that I don't want to, it just feels like everything is being sucked out of me. I'm tired of welfare and all of the ridiculous things going on, but it seems like if I distance myself from anything else I'll perish. I'm unhappy and I've begun to not be able to visualize a future for myself. I guess I'm just tired of being scared all the time and hating our government, but I don't know what I can do to save myself and the things I once valued. Has anyone ever experienced this and can anyone give advice?