need help feel so bad..

I really need an outside perspective on my situation. For quite a while now, I’ve repeatedly felt that my partner looks at other women. Sometimes it seems like his gaze lingers longer than it does when he looks at men, and there have also been situations where, from my perspective, he has turned his head and followed a woman with his eyes as she walked past. For example, one time we were in the car and a woman was walking on the left side of the road. From my perspective, he turned his head and followed her with his eyes until she was beside me. Another example happened yesterday. From my perspective, he looked at a woman who was standing at the back of a parking lot for a longer moment, and then looked at her again briefly after we had parked. When I brought it up afterward, he told me he hadn’t looked at anyone. The biggest issue isn’t even the looking itself anymore it’s what happens afterward. Every time I bring it up, he tells me he didn’t look at anyone or he describes the situation completely differently from how I experienced it. This has left me feeling like either he’s not being honest or he genuinely remembers these situations differently than I do. I honestly don’t know which of those is true. I just know that our versions of these situations are consistently very different. Talking about it doesn’t help anymore. He gets frustrated or angry because he genuinely believes he doesn’t do this or he is lying. At the same time, I feel like my perception is never acknowledged, which has become incredibly hurtful. This has affected me so much that I constantly think about it, and I’ve even started dreaming about it. I’m wondering how other people would handle a situation like this. If you repeatedly felt that your partner was looking at other women, but they always denied it or remembered the situation completely differently, and talking about it only led to arguments, what would you do?