How do you get over crushing apathy?

I dont know what’s wrong with me. I have so many good things in my life. I have a great family, a few good friends, a good job, great benefits from said job; but even with all that I just dont care about anything…. I’m not sad or angry, or happy I just feel nothing and regularly wish I could disappear and be done with it all. How is it possible to have so many good things and still feel this way…