Sorry slight detail.
Diana & Charles were lucky. They met quite a few times before they got engaged.
Most of my family after 4 chaperoned meetings the decision had to be made. There was no going back after either & changing your mind.
My dad did check with me on our wedding day that I was happy to go ahead & I was.
Diana told her sisters she wanted out. They told her it was too late. That’s on her family and no one else.