EVER since he fell in love with Meghan Markle, Prince Harry has gone from Superman to the Joker.

Travelling the world to take the Duke of Sussex's photo used to fill me with excitement, because you knew he would have fun.

10 Prince Harry hasn't looked really happy for a long time and often he seems totally miserable, says the Sun's royal photographer Arthur Edwards Credit: Getty - Contributor

10 Despite the happiness that Archie should bring, it seems the life Meghan Markle had before is the one she would prefer Credit: AFP PHOTO/HENK KRUGER/AFRICAN NEWS AGENCY (ANA)/POOL

You couldn’t take your eyes off him because he was guaranteed to do the unexpected, like playing football with street kids, racing Usain Bolt or hugging a prime minister.

He was a joy to work with, a normal guy in the street who just happened to have a royal title. The whole world loved him.

But over the past two years his relationship with the media has not just turned sour — it has become toxic.

I haven’t seen him look really happy for a long time.

Often he seems totally miserable.

To go from being the most popular member of the Royal Family to where people barely care about you, something has to have gone seriously wrong.

SHE IS THE PROBLEM

Last September I went with him on a visit to Lealands High School in Luton, where the children went crazy for him.

As they queued to be hugged by the Prince he had a massive smile. He was almost like the old Harry.

And as I walked away from the school I realised the reason he seemed so happy. Meghan wasn’t there.

I am sad to say she is the problem.

When she arrived on the scene I welcomed Meghan, and the people did too.

On walkabouts outside Edinburgh Castle, in Dublin and Cardiff, as well as on their first official foreign engagement in Morocco, the crowds loved her.

She often kept Harry waiting because she spent so long chatting to well-wishers.

Meghan seemed to me to be doing incredibly well and I thought she was going to be a great ambassador for the UK.

Now I am not so sure.

Where did it all go wrong?

FAIRYTALE DAY

Their wedding, just 20 months ago, was spectacular.

Thousands of you turned out in Windsor to cheer them in their carriage, millions more bought souvenir copies of The Sun to keep the memory of that fairytale day.

On Christmas Day I watched Prince Charles walk to church at Sandringham with his grandson Prince George.

I remembered how, just a year earlier, I had photographed William, Kate, Harry and Meghan all smiles.

What had happened in just a year to change everything?

Harry and Meghan are blaming the media and have cancelled the Rota — a system where each newspaper takes a turn in covering royal engagements and shares the pictures with every publication.

Now they are going to ban all newspapers except The Daily Telegraph.

But they should beware, the Telegraph is a serious newspaper — just ask the MPs who fiddled their expenses.

And if it finds the Duke and Duchess of Sussex should be held accountable for something, the paper will inevitably do its duty and inform its readers.

But it can’t all be blamed on the media.

10 Harry and Meghan's wedding 20 months ago was spectacular and brought the country together Credit: AFP and licensors

10 Over the past two years Harry's relationship with the media has not just turned sour — it has become toxic Credit: Getty - Pool

10 I remembered how, just a year earlier, I had photographed William, Kate, Harry and Meghan all smiles Credit: Getty - Contributor

The clues were there even before the couple’s wedding, when Meghan’s stepbrother wrote letters to Harry telling him: “Whatever you do, don’t marry her.”

At the time we thought they had an axe to grind. Looking back, maybe they were right.

There is usually a reason why someone marries with just one family member in attendance.

No one could have had a better welcome into the Royal Family.

Who can forget Prince Charles proudly walking Meghan down the aisle on her wedding day, or the pictures of the Queen and Prince Philip beaming at baby Archie.

Despite this, the life Meghan had before is the one she would prefer.

Harry is besotted with her and will do anything to keep Meghan happy.

But the couple do not seem to have properly worked out their plan for the future.

You cannot be half in the UK and half in America.

I don’t think you can “pop in” for Trooping the Colour but not be there for Remembrance Sunday.

You can’t be patrons of charities and not give them a lot of your time, they depend on royal patronage for their funding and their donations.

What’s Harry going to do? Appear on TV shows? Cosy chats with Oprah? Speeches to American millionaires?

I suspect he will hate that.

ADVERSE PUBLICITY

Will the Sussexes lose their titles as HRH, which bring great privilege and kudos?

I saw it happen to the Duchess of York. Now Fergie is on American TV flogging Weight Watchers programmes and Wedgwood china to make a living.

If that’s what the future holds for Meghan and Harry it will be a sad turn of events.

So don’t be stupid, Harry. When you finally spoke to the Queen and your father about your decision yesterday, I hope you listened to what they had to say.

Charles is a man who, after the death of Diana and his marriage to Camilla, suffered more adverse publicity than any member of the Royal Family in modern times.

He didn’t run away. He didn’t hide. He didn’t criticise. He didn’t ban anybody from the Rota.

Charles and Camilla faced up to the criticism, got on with it and showed they were two people who want to do their duty for their country.

No matter what bad publicity they have had, they have always looked straight down the camera and won over their critics.

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Harry has always said his role in life was to support his brother, so what has changed?

Hopefully, Prince Charles will be our king — but the reality is it won’t be a very long reign. After that William will have this almighty responsibility as monarch.

I just hope this feud can end and that Harry will return as a full-time member of the Royal Family to support his brother.

10 Charles and Camilla faced up to the criticism, got on with it and showed they were two people who want to do their duty for their country Credit: Getty - Contributor

10 The couple do not seem to have properly worked out their plan for the future. You cannot be half in the UK and half in America Credit: Getty - Contributor

10 Meghan opened up to ITV about 'not being okay' Credit: ITV

10 The couple do not seem to have properly worked out their plan for the future Credit: Instagram

10 The Sun's Arthur Edwards believes Meghan has made Harry miserable and made his relationship with the media toxic Credit: Rex Features

'Just go back to the way you were' – Sun Royal photographer Arthur Edwards in heartfelt message to Prince Harry after he steps down as ‘senior’ member of family