Yes, yes, yes, move on, move on, move on.....
But emotions don't move on so quickly. I don't fall in love easily, but when I do, my emotions run pretty deep, so for me, it takes time for emotions to dissipate. And there's the regret over misundertandings, over things that couldn't be worked out, over times when we behaved in ways that were unkind to each other (even though we loved each other), sadness over the loss of hopes and dreams, thoughts about what might have been if the circumstances had been different (we both had stressful job situations, I was contracting in London etc).
How do you expect to get over the emotions if you sit there moping about like a big wet lettuce?!
Think of it this way, emotions are like information stored on a harddrive. Even when you delete the info it's still really there. The only way to make sure that info is gone is to overwrite it, maybe several times but it works.
In other words, get off your backside, go out, meet new people and try finding a new girl. This will definitely help remove the old feelings!