Broke up with the BF of almost 4 years two weeks ago, so I'm kind of in the same boat.
What helped me was this;
- Have ONE DAY of crying like a crazy person, pigging out and feeling sorry for yourself (Best if youre alone).
- Dont tell everyone about it first oppotunity you have! I don't know about you, but I can't handle sympathy if the wounds are still fresh, without giving into it. Allow yourself some time before you make the announcement to your friends. This is also helpful because you can have a day out, without being reminded of your heartbreak. Whatever happened, has made a big impact on your world, and having your friends change to suit the situation may be a little too much. You need all the stability you can get at this stage. Tell your friends / family, when you can handle it. You will be thinking a little more clearly and their advice will be more valuable that way.
-Retail therapy!! This is a must. Buy something a little out of your usual style, something you have admired for a while, but have never been brave enough to buy. This is all about breaking the restrictions placed on you from your previous situation. Buy something to CELEBRATE the change of self.
-Don't pig out after the first day. Rather, go for a run and eat healthily for a few days. You will feel less stressed, fresher and more driven.
Its best to avoid confronting the situation until you can see clearly enough to take it all in. Be the bigger person, and recognise that yes, you feel like crap now, thats expected... But it is only part of a process which will see you emerge as a stronger person.
This all may sound a little tacky, but it has worked for me.