My DP of 5 years, broke up with me day 5 into an 11 day holiday in the Caribbean (you may or may not remember my thread). This was last October and I was absolutely blindsided and completely devastated.
I came to MN for support, people explained there was probably someone else. That hurt. There was but not who I suspected and that didn't come out for months. I spent about 6 months in a fog, didn't eat properly or sleep much. I switched between crying and just feeling empty.
I was fairly dignified I think. Didn't chase him. Cut him off completely for about 4 months (then met up after a momentary lapse in judgement) and have now cut him off again since March. And forever.
I just remember how terribly sad I felt. People kept telling me I'd get over it but I really didn't believe them. I was thinking "our relationship wasn't like everyone else's" or "I'll never fall in love again". I honestly thought I would never feel ok ever again.
But I can't even really remember the depth of those feelings now. I've reconnected with all my friends. I've started seeing a HOT guy. Who is fun and beautiful and the sex is amazing. But first and foremost I just feel happy and free.
I was out with a mutual friend of the ex last week who mentioned his girlfriend (the OW) and it just didn't hurt. At all. It's no longer a hot knife through my heart. In the words of Gotye, now he's just somebody that I used to know 
Anyway, I only wanted to post to say to anyone that is struggling at the moment with a cheaty bastard....Don't worry.
It WILL be ok
You WILL be happy
Think of all the new HOT sex
Think of all the friends you can reconnect with.
And never forget, he's a turd 