Nothingness, No feeling AT ALL

ok A little background, I am 22 years old, graduated from a really good university 2 years ago, have a full time salaried job, I know I am a good looking girl, and I am very confident, no self-esteem problems. The reason I share this info is because I want people to understand my situation. 

I don't even know how to start to explain this,  but I seriously feel nothing, as in, I don't want anything, I don't want to live, I don't want to die, I don't want to
eat, I don't want to drink, I don't want to do drugs to kick me out of this, I don't want to drink alcohol, I don't want to move, breathe, or be conscious of anything. It's tripping me out, because I am not depressed, I have a passion for life. I know that right now I'm going through more of a down phase in my life which means I'm not really happy with my job, and I recently went through a breakup, but I always pushed myself and got by. I mean, every day I am determined to find a better job, and I am actually doing pretty well. I have gotten a few replies and interviews scheduled for prestigious internships, and I have a plan of where exactly I want to do and be with my lief in a year from now. I know that healing a broken heart takes time, and I let myself be sad from time to time, because those are my feelings and I'm not going to ignore them (6 months ago I broke up with my best friend and lover of 7 years, since I was 16), and quite frankly, right now I'd rather be extremely depressed than feel this nothingness that I'm struggling to describe. It's like I have no emotions or desire for ANYTHING, it's scary. Usually when I'm sad I just want to eat, watch a sad movie and cry myself to sleep, but right now, nothing. Has anyone ever expereienced this? I feel like I'm stuck in this nothingness of thoughts and feelings LIMBO and I'll never snap out of it. 

WHAT IS THIS NO-FEELING?