Any of us can say to you "time is a great healer" and that is true.
Won't be of any use to you right now though. The short term solution of going out and "enjoying " yoiurself with all your mates,getting larrupsed,nailing fit or fat available women whilst she is still forefront in your mind won't be fair to yourself or anyone you meet.
Some time to reflect on what has happened is good, I'm not saying shut yourself away and down vodka til 3 in the morning ,pestering the ex with tearful phone calls and threats/declarations of love etc etc like some people do.
Perhaps,as already posted, taking up an old abndoned hobby or a new pastime which went on the back burner would be one step forward for you?
stay strong and you'll be fine mate.