If Harry was dating Lady Poundcake, she would also be at the polo and no doubt probably give him a hug.
Nothing I see from Meghan and Harry is unique. He's done all this before.
The difference with this relationship is there appears to be a biological clock ticking. I agree the older he gets the more likely he will be to get married, whether that's a good reason or not.
But he's not dating Lady Poundcake, and that's a fact.
I think there are fairly significant differences between Meghan/Harry's relationship and Harry's prior relationships. But we each see what we see and interpret as we will.
Personally, I don't think there's any doubt that this relationship is quite different, and not just because of their ages. It's already been reported how comfortable they are with each, and how things just seem "natural" between them, as if they've "always known each other." Harry's November press announcement is unprecedented. And it seems that after the trip to Norway, their relationship deepened, with Meghan spending a great deal of time in London with Harry in January and February.
Then the Inskip wedding in Jamaica. And I don't ever recall hearing so much about Harry whisking a young lady away for a special trip to see the northern lights, or to attend a best friend's wedding and escape for several days afterward to an exclusive romantic hotel with a cave restaurant. And then the private date night at the London museum. There's the fact that Harry detoured to see Meghan in Toronto on his way back from the Caribbean. He recently made the trip to spend Easter weekend with Meghan in Toronto. So they are each making notable efforts to ensure they spend quality time together and bridge the long distance.
In addition, there is the larger public interest generated due to Meghan's high profile as an actor, and as an American living in Canada with an already built-in fanbase from her tv show and her lifestyle blog. Another difference is that Meghan is an independently wealthy career woman who has had past relationships and breakups which allows her to know more about herself and has prepared her for this experience with Harry. She brings a lot to the relationship. They are both at a point in life where they have admitted being ready to start a family. And they have given themselves time for their relationship to develop. It's simply the nature of who Harry is that colors everything and ratchets up the public's interest and the media's OTT intrusiveness, which they are determined to keep a lid on.
While we've seen Harry canoodling affectionately in public with Chelsy before, he always seemed a bit bored in the pictures I've seen of him with Cressida. It was young love with Chelsy that did not endure for a number of reasons, including her extreme discomfort for having to deal with relentless media bombardment. Nor was Chelsy that interested in living in London long term after trying it out. I'm sure Chelsy and Harry had opportunities to get away from it all and spend quality time on trips together, and at her home in South Africa. But again, that was young love, and Harry was also dealing with unresolved grief throughout his twenties, as he recently revealed. He reportedly was interested in possibly marrying Chelsy, but the problems they faced led to them having an on again off again romance. And then they split for good around the time of William/Kate's wedding. After the birth of his neice and nephew, Harry found himself even more eager to have children of his own. In interviews, he often discussed being ready to find the right person, willing to take on the pressures of royal life.
The military further matured Harry, and the experience in Las Vegas, likely helped lead him toward seeking help for his emotional issues. In recent years, he seemed to be more philosophical and reflective, and also more purposeful in regard to his work with Sentebale, and with injured veterans, which led to him creating the Invictus Games.
So, like Osipi said earlier, both Meghan and Harry have been leading full and purposeful lives. They appear to have a lot in common, and to have come together at the right time for each of them.