Loss of love

I ended my ten year long engagement. It was the hardest thing I've ever done and it's now been 21/2 years since I left. I still grieve for the loss of love that we shared. I never knew it would be so hard and if you ask me why I ended it I couldn't say. I think I was bored. It became routine...stagnant. I needed perspective and once I left and got that perspective I realized I wanted to come back but it was too late- he had moved on. Just 4 months after I left he started dating someone else and now they're engaged and she has turned him into this person I hardly recognize. It makes me so sad. And even though I'm moving on with my life, I still have pain in my heart for my broken relationship.