This is a matter of opinion, not fact. IMO.
https://www.telegraph.co.uk/news/20...-girlfriend-while-she-was-still-dating-celeb/
She and Cory lived together, playing husband & wife without the paperwork. It was a committed (on his part at least)
relationship for years. I think if Wallis had had the ability to live with and not marry she would have done so the second time around as well, that was not a choice in her era.
Meghan had a live-in relationship with Cory Vitiello for about
two years. They began to drift apart due to Meghan's changing career interests and goals. I know from looking at Cory's Instagram that he took care of her dogs quite often when she was away or on long shoots at the studio. He baby-sat the dogs and took them to the dog spa, etc. It looks like Cory and Meghan had a loving and committed relationship to the degree that they both wanted.
None of us were in the relationship, so we do not know intimate details. Much of what any of us know is from gossip and speculation. Cory gave away nothing when he conceded to the Daily Fail interview in the lead-up to the royal wedding. I think Cory and his Mom got tired of being bombarded by the media. Likely through a go-between they both gave Meghan a heads-up that they would be speaking to Daily Fail. However, they each only had positive things to say. Neither shed any light whatsoever on why Cory and Meghan broke up. Cory's Mom spoke about Meghan visiting for Christmas dinner in 2015, and she seemed wistful about the fact that Meghan and her son had been happy together. But she knew nothing about why they broke up, and said she'd never asked why. Again, Cory gave DF nothing. He laughed at the more intrusive questions.
Meghan's former p.r. agency friend, Gina, has given interviews suggesting that Cory and Meghan simply found themselves on different paths in life and were drifting apart. It's purely speculation on my part, but sometimes accomplished men can tend to be a bit insecure when a strong, feminine, career-minded woman begins to have outsize success or achievements. And I think this possibly began to happen in the Cory/Meghan relationship when Meghan received attention for her work with the U.N. Even though the larger public did not know much about Meghan prior to Harry, by 2015 and early 2016, Meghan was becoming widely known and admired in entertainment, fashion & beauty, and humanitarian circles.
Lucky Prince Harry met Meghan at just the right time, before the world fully discovered her and before larger fame claimed her.
Some people think it's Harry that made Meghan. But Harry knows otherwise. Like he said to himself when he first laid eyes on her, "I'm going to have to up my game."
Meanwhile, Prince Harry doesn't strike me as a guy who feels insecure around a strong woman, because his own mother was a strong woman who grounded him and surrounded him with love. Diana also taught her two boys that it was okay to have fun in life, and that it's important to give back to others in need. I believe Prince Harry sees these particular qualities in Meghan, which seemingly reminds him of his mother.
Should be titled "look at these pictures where they both smile, both wear dark dresses, both part their hair in the middle. So they are the same". 
