TIRED of waiting for RYAN GOSLING to pop the question, Eva Mendes gave the Canadian thesp a stinging ultimatum, ordering him to put a ring on her finger – OR ELSE.

The 39-year-old “Training Day” beauty is demanding that the 32-year-old hunk propose to her by the two-year anniversary of their romance, which is only a month away.

“Ryan and Eva are on the rocks over his refusal to make a solid commitment to her,” revealed an insider. “He’s been dragging his feet on proposing.

“He’s obsessed with his career and claims he can’t focus on anything else at the moment. Until now she hasn’t pressured him, but she’s just a few months shy of 40 and told Ryan that if he doesn’t want to start a family with her, she wants to find a man who’s ready and willing.”

The talented duo first met in 2011 on the set of “The Place Beyond the Pines,” and sparks flew. But while filming their upcoming movie, “How to Catch a Monster” – which Ryan wrote and directed – they’ve been bickering, a source says.

As THE ENQUIRER previously reported, the couple’s fall 2013 marital plans were derailed when Eva started fuming that Ryan was bossing her around on the set too much.

But now the Latina bombshell has cooled down and is trying to enlist the help of the “Crazy, Stupid, Love” star’s mom to seal the deal.

Said the source: “Eva knows Ryan’s mom is anxious to become a grandmother and is hoping she’ll talk sense into him.”