Jennifer Lopez and new flame Ben Affleck kissed, cuddled and made goo-goo eyes at each other for hours yesterday as the Latina lovely was feted at a surprise birthday party.

J-Lo, who turned 32, was ushered by a grinning Affleck into the posh Park eatery on West 17th Street in mid-afternoon, supposedly for a quiet lunch. 

But once inside, the flustered star was greeted by thunderous applause from her family and friends. 

Next, she introduced the new love of her life to mom Lupe, dad David, sisters, grandmother and nieces at the gala gathering of 25 revelers. 

Wearing a fetching blue silk dress, J-Lo sat close to Affleck and could be seen affectionately canoodling and whispering with the star of the hit The Sum of All Fears

Lopez's manager, Benny Medina, "gave a lovely speech that had everyone in tears," one witness said. 

A cake was carried out, and the crowd sang a rousing version of "Happy Birthday To You." 

Affleck gave his honey a Harry Winston bracelet of yellow and white diamonds.

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