I would never try to force someone to do anything they didn't want to, but it'd you are thinking off wether to give a police statement or not here's my thoughts
I know you don't want to....But...maybe look at this as the universes way of saying this isn't going away so you might as well deal with it.
I spent decades lying awake at night going over everything. Then one day got up got dressed and walked into the police station. I'm not sure what was so different about that day, but I'd just had enough.
Through no fault of your own this has come crashing back into your life. So as the saying goes "there's no time like the present". Maybe consider that if you are ever thinking about getting it officially on the record to the Police it might as well be now. You even have a perfectly good reason to the inevitable question of why report now? To which your answer is because I've got no bloody choice I've been outed.
Id use the anger and the stress and worry this has brought to the surface and go talk to the police and give a statement. Then it's done, and what will be will be. Then you can start married life knowingyou've done what you can about the traumatic bit in your youth.
Boiled x
💐