Moving is always a big thing. As for Darren, you can get over him, but you dont want to. he likes the fact that you are available, even tho he will not commit. It is his best of all possible scenarios.
But Moving will not always bring you peace. It will bring you distance. There will always be that nagging thing in the back of your mind that says "what if". It may be controllable and eventually become a distant echo. I hope so.
You have a good family, and a good boss. I hope you think it through, and whatever you decide, I wish for you the best.
In the end, you do what is best for you. And only you know that. We can only advise. You have the key to your future.
best of luck, always.