Wow.  Know how you feel Brian.  Lost my partner of 26 years about 18 months ago.  He was my 'world.'  I never thought I'd get along without him.  Yes, it's hard, and painful, and sometimes it's day by day.  But I go on because I know he would want me to continue to enjoy life as much as we did together.  You are in shock right now.  You will get over the worst of this.  Life will be different now, but you are not alone.  Find things to fill your time now, and set aside things and time to reflect on the bond you shared.  Be grateful, as hard as that may seem right now.