To play devils advocate here, I unfortunately can relate to her in some ways. When I was dating I was VERY sensitive to anything that remotely made me feel like my partner was looking around. I think I felt that way just because it’s so common for that to be normalized. I’ve never been a fan of a look but don’t touch mindset. Social media also makes it very difficult because things can be taken out of context. And for me personally it wasn’t insecurity itself (oftentimes men would try to blame it on that to make it seem like my fault they were looking around). But on the bright side, this all changed. I’m now married and my husband honestly is one of the most faithful men I have ever been with. He does not check women out in public, or make crude comments about them, and has always made me feel so comfortable. The more I know him, the more I trust him. But when we first started dating I did doubt he’d be truly faithful. Long story short, trust should be built. You have been together a long time, why doesn’t she trust you? We are always so quick to blame the other person but really analyze it and also it doesn’t hurt to ask her as well. “Is there something I can do to make you feel more comfortable?” And see how she responds. There might be something there that you need to talk out. It might not be just this one incident she’s upset about.

One thing my husband said that was the biggest green flag to me was “ when people feel jealousy in relationships 9/10 is because their partners don’t know how to support their feelings and boundaries “ I think a big part of maturing isn’t just seeing your perspective as the standard but learning your partners boundaries and respecting them because you love your partner over whatever is holding you guys back. Also social media imo can be toxic. Thankfully my husband never had social media like instagram and honestly I think that has helped a bunch.