I split with my ex 12 years ago........maybe its the divil in me, but every year I send him a text saying happy (un) anniversary!
and I bet he calls me a choice word or two!
there are lots of 'inspirational' sayings, onwards and upwards, don't look back, etc etc.... my favourite is from My Big Fat Greek Wedding, "Don't let your past dictate who you are, but let it be part of who you will become."
its hard sometimes to move on, (I had 3 years to learn to move on while he lived downstairs and told me he wasn't moving out! he eventually did) but my tip is always have a tub of ice cream, a bottle of wine, or a bar of chocolate in stock, and a computer or laptop, so you can come on line for support and you wont go far wrong ((HUGS))