How to get over SO’s wrongdoings towards you?

I’ve written about this before, but I’m really struggling. My fiancé (M26) and I (F21) have been dating for a year and a half. 5 months into the relationship I told him that I was uncomfortable with him liking lingerie/sexy pictures of celebrities and influencers. He unfollowed about 200 of them and apologized. Though he got upset when I said that it’s a turnoff and it will eventually make me lose feelings. Come to find out that he was still doing it with girls he’s acquaintances with.

If it was just posts, I’d maybe understand a bit more since they’re bikini pics at most. But he also went out of his way to like stories of their selfies, and one was a girl he knew from his study abroad six years ago in booty shorts and a sports bra. He was doing it up until a month before we got engaged, and I didn’t realize until about 4 months after. He’d already stopped when we got engaged, but I still confronted him asking why he did it. He said it’s because “he likes to see people thrive.” I told him to quit the bullshit and admit it’s because he found them attractive. Which he did, and honestly it broke my heart. I know I asked for the honesty, but I didn’t expect him to be blatantly disrespecting our relationship for these people.

It’s partly my fault for never explicitly saying that I didn’t want the story/post liking to be done with people he knows either, but I thought it was kind of a given? Considering it’s worse than doing it with celebrities? And his standards for me are a lot higher than what I ask for. He was consistently liking almost every post of girls he used to be interested in, while we were dating as well. Which makes me think. why is he paying such close attention to when and what they post?

I’m really trying hard to get over all of this because I want to be with him. He’s been following through with his word and not liking any posts/stories and blocked some of the girls that were involved. But at the same time, I wonder if this is a temporary thing and I’m wasting my time. I’m also unsure of marrying someone who’s eyeing other girls while they’re in a relationship like this? I know some of it is partially biological and “men can’t help it,” but it’s not that hard to not double tap? And stories take more effort?

Honestly I just need someone to tell me I’m overreacting because it’s already been 3 months and it’s still really hard for me to not think about it even though I want to. He treats me and my family really well apart from the double standards, and looking at other girls. He’s even pitched in a few hundred dollars for my mom’s new clothing washer when it broke, which a lot of guys wouldn’t do.

But I’m at the point where I’m thinking “what if he does it again behind my back?” Even though I didn’t do this before, when we’re out in public if I seem someone that I think might be his type I check to see if he’s looking. It’s exhausting. I’ve done my best to not cross his boundaries but it feels like he prioritizes his own needs and feelings over mine when it comes to the other gender. I really do want to get over it, but it’s like a record in my mind that just keeps replaying the events on its own.

If anyone happens to be curious about more details I would appreciate you reading my fourth post.

TLDR: Fiancé was liking posts and stories of past girls he was interested in (they’re always the focus of the post) when we talked about this boundary in the past. He’s not doing it anymore, but I need help to stop thinking about it because it’s eating me up inside. I want to keep the relationship and I want to learn how to forgive.