EXCLUSIVE: Andy Cohen, 48, gets affectionate with his Harvard PhD boyfriend, 28, during romantic post-holiday dinner date in New York City

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Andy Cohen and his boyfriend were spotted enjoying a romantic dinner in New York City on Sunday night.

The Watch What Happens Live host and his beau of almost two years, Clifton Dassuncao, grabbed a bite to eat at the trendy Waverly Inn near Cohen's apartment in the West Village.

A fellow diner tells DailyMail.com that the two were affectionate throughout the meal, with Dassuncao leaning over at one point to plant a kiss on Cohen's head.

The lovebirds also enjoyed some wine and sampled one another's food during their post-holiday dinner, arriving to the restaurant at 7:15pm and heading out a little over an hour later at around 8:30pm.

Cohen had been in his hometown of St. Louis over the long weekend to celebrate Thanksgiving with his family, and it is not clear if he brought Dassuncao along on the trip or if the New York City native stayed back on the East Coast.

The Bravo executive, 48, met the 28-year-old, who is a fellow in Environmental Science and Engineering at Harvard University, back in March 2015 during the opening night of his AC2 Tour with pal Anderson Cooper in Boston.

DailyMail.com revealed the two were dating back in April, after Dassucano joined Cohen on Barry Diller's $150million yacht Eos for two Caribbean getaways in the span of three months.

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Watch what happens: Andy Cohen and his boyfriend Clifton Dassuncao had a dinner date Sunday night at the Waverly Inn in Manhattan's West Village (above)

Lovebirds: A fellow diner tells DailyMail.com that the pair were affectionate throughout the meal, drank wine, and shared their food

Going strong: Dassuncao, 28, met Cohen on opening night of his AC2 Tour in March 2015 and the pair have been dating ever since

In the beginning: Dassuncao first posted a photo of himself and Cohen back in July of last year after a taping of Watch What Happens

Cohen - who has written and released three autobiographical diaries in the past four years detailing everything from his late-night FaceTime sessions with Cooper to the threesome he had with a husband and wife (whom he also met in Boston) - has kept remarkably quiet about his relationship with Dassuncao, who is 20 years his junior.

The man behind the Real Housewives franchise has always been shockingly private when it comes to his love life and sexual escapades, though he has admitted to hooking up with Lance Bass and made it very clear on multiple occasions that he and Cooper have never dated or had sex.

Cohen's reps at NBC and Bravo also had no comment back in April when asked about his relationship with Dassuncao, who set his Instagram account to private after it was revealed that he was the Bravo boss' new boyfriend.

Cohen did briefly talk about his boyfriend during an interview with The Daily Dish last month though, but did not mention Dassuncao by name.

In that interview, Cohen discussed his dog Wacha's relationship with his new beau, saying: 'Wacha loves him. I met him with Anderson Cooper on the opening night of my tour with Anderson. And Anderson has loved this guy from the moment that I met him. 

'I remember saying to Anderson, like ten months ago, that Wacha really likes this guy and Anderson said "Dogs always know. You have to listen to your dog."'

Giving thanks: DailyMail.com revealed the pair were dating in April after Dassuncao twice joined Cohen on a trip aboard Barry Diller's $150m yacht Eos

Jetting home: Cohen had been in St. Louis over the long weekend celebrating Thanksgiving with his family

Wicked smart: Dassuncao grew up in Queens, attended private school in Manhattan, then went to MIT for undergrad and Harvard for a Masters and PhD

See and bee seen: The Waverly Inn (above) is close to Cohen's apartment in the West Village

Cohen also briefly opened up about his relationship during an interview with Matt Lauer on Today earlier this month, though again did not mention Dassuncao by name or share any personal details about his Ivy League-educated man.

While promoting his latest book, Superficial: More Adventures from the Andy Cohen Diaries, Cohen said that it was his relationship with his new boyfriend that made him want to 'put the pen down' during a writing session over Memorial Day and live more in the moment.

'I started to get emotionally exhausted reporting on my life kind of, and I said, "I have to go live it. I've got to go do this. There's this great guy here,"' Cohen told Lauer.

He also said in that interview that he was starting to consider the possibility of having a child one day. 

In and out: The pair arrived for dinner at 7:15pm and headed out some time around 8:30pm

PDA: At one point during the meal Cohen leaned over and planted a kiss on Dassuncao's head

Keeping quiet: Cohen has spoken very little about his boyfriend, though did recently admit his dog Wacha and Anderson Cooper approved of his new love interest

Dassuncao first posted a photo of himself and Cohen in July of last year after seeing him on Watch What Happens Live, four months after the pair began dating.

'This happened, live,' wrote Dassuncao.

A week later he posted a photo on Instagram of his summer reading list which included a copy of The Andy Cohen Diaries, which Cohen liked.

Dassuncao is one of only 289 people that Cohen, who has 1.5million followers, follows on Instagram.  

He posted photos of himself on Diller's yacht last December, including one photo where he wrote; '#monkeybusiness.'

Cohen commented on that photo; 'Monkey business is right.' 

Dassuncao posted a photo while on Diller's yacht in the Caribbean last Christmas (above), which prompted Cohen to respond

Cohen also posted a photo from the trip last Christmas (above), though not one of him and his boyfriend together

Cohen and Dassuncao took a couple's vacation this past April in the Caribbean on a megayacht belonging to Barry Diller (in green). Also on the tropical getaway was, l to r, Lauren Blum, Diane Von Furstenburg, Bruce Bozzi, Jason Blum and Bryan Lourd

The Palms owner Bruce Bozzi also posted a photo back in April the showed himself and partner Bryan Lourd, Diller and wife Diane von Furstenberg, producer Jason Blum and his wife Lauren, and Cohen and Dassuncao on vacation in the Caribbean. 

Dassuncao was tagged later that week in a photo having lunch with Kelly Ripa and Mark Consuelos.

Ripa's children and producer Sandy Gallin were also at the lunch. 

Dassuncao has an incredibly impressive resume, having worked for the Centers for Disease Control and Prevention and the U.S. Geological Survey in addition to his research at Harvard, according to his Linked In.

He grew up in Queens and attended private school in New York City at Loyola on the Upper East Side

He then went off college at the Massachusetts Institute of Technology.

After college he stayed in Boston and received his Master's Degree from Harvard.