Dad [55m] keeps shaming me for not having a gf. Im [25m]

My dad will embarass the hell out of me infront of others by saying things like "I wish Jeremy paid less attention to his computer and more attention to girls". I tried explaining to him that things are different than when he was a young man. I told him girls do not appreciate being approached and its creepy to do so. And I also cant hit on girls at work because then I would be fired. I explained to him that I tried online dating and got 0 replies in a 2 week span. When he was young it seemed to be a lot easier based on what he told me. I dont appreciate being degraded for something that I wish was different but I have no power to change. The last time I tried flirting with a girl was at a club. Her and her friends burst out laughing when I tried dancing next to her. Then they moved to the other side of the dancefloor. Why try if I will be mocked and humiliated or labeled a creep or sexual harasser?

tl;dr: dad keeps nagging me about not having a gf. Sometimes he will publicly embarass me infront of others for it. It makes me feel like shit. How do I stop him?