When this happened to me, I've changed completely and wanted to kill myself in some awesome explosion. Therefore I almost joined the french foreign legion.
I'm insanely breakable when it comes to these matters, so all I have left inside me was emptyness and rage.
I came back on my feed, but it changed me forever. I've never felt so close to anyone than her...
Yeah, thats a long story....
So, what helped me:
I started to draw and paint.
Coffee
My good old nerdy internet friends
Okay, If you kept reading, here goes the less useless part of the post:
I believe that loosing someone you love is, like dying, loosing ones parents, getting disappointed one of the awful, but inevitable events in life. Its inavoidable, but even though it hurts, it will bring you forward, to new events in your life, helps you meet new people IF you are not letting the suffering pull you under like I did. Otherwise you'll simply loose all your old friends and 2 years of your life and your job...(like I did).
Aww man! This post is getting worse every word I type >.<
Yeah, get on your feed, keep fighting, don't loose faith and get yourself a beer..
Whatever

I should go to bed
-Wolf