That's hard man, really hard. I went through a pretty nasty breakup not long ago and I'm still dealing with the backlash. I know this may seem like it's not your thing, but try mediation. I went and found some online mediation exercises that helped me a lot. Helped a lot more than drinking at least. If you're anything like me you probably stay awake every night with a knot in your stomach. Give meditation a shot. I was able to sleep after trying it a few times and I've moved on so much more rapidly than if I had never tried it.
That's the best advice I can give. You need to find a new purpose in life because you just lost one. I'm recommending meditation because it helped me refocus my reasons for living. Send me a message if you want some help or guidance with meditation if you're interested. I know it's a little strange and it seems a little abnormal at first, but once you try it you stop thinking of it that way.
Time is a great teacher, but unfortunately it kills all its pupils ... - Louis Hector Berlioz
Gene Police: You!! Out Of The Pool!