Emotional Rollarcoaster

I haven't felt proper emotions for over a year. Now I'm starting to feel everything all at once in some kind of delayed reaction, and it's very overwhelming. I have no idea how to cope with it all.

I'm either:
1) completely apathetic
2) feeling emotions of love and devotion that I should have felt a year ago but was too numb to feel them at the time
3) feeling incredibly hurt, sad, angry, lonely and confused all at the same time

The opposite ends of the emotional spectrum alternate every five minutes. My brain is misfiring or something ... and I feel like I'm going crazy. It CAN'T be possible to live like this!