Who was "The One that Got Away?"

Han Solo. Should've shot him first...

...but I didn't :/

Gonna post this from a different question but answers this question:

For a quick example (I don't want to go into too much detail), I had the love of my life a few years ago "the one that got away" you may say. We both loved each other. However she got offered a job in the US (i'm in the UK). We know that if she moved over there that we would have to break up. I couldn't move to the states (my job is very UK specific), but I did toy with the idea.

Anyway I had to make a decision, move with her and sacrifice everything in my career to that point, or stay in the UK and let her go. I talked with her, and explained the job that she had dreamed of had been offered to her, and I didn't want to be the reason that she didn't take that opportunity. She took the job, moved to the US she ended up the one who got away.

I knew that it was the right decision, but my mind now is full of "what if's?" , what if I convinced her to stay? What if I moved there and changed my career? Just what if? what if? what if?