My friend you only have one thing to do. Find a new life. If you can't find one, then you have to MAKE one. It's time you realized she isn't going to be there with you forever. You have to get up (and out) of that house of yours and start to do things. Don't worry about meeting people. Once you start to do things, the meeting people will come natural. Join a sport, go to the gym, join a social club of some sort. Do anything BUT sit at home and wallow in self-pity. Her love for you is gone, so wait no more. There are other fish in the sea. Polish that rod, (no pun intended) and get out there.
Your friend,
"I still find each day too short for all the thoughts I want to think, all the walks I want to take, all the books I want to read, and all the friends I want to see."
- John Burroughs