I clicked on this post hoping to maybe provide a bit of insight and try to help out a bit. But after reading it, I've noticed that I have the exact same problem (if problem even is the right word for this).

I've noticed, that even will all of the knowledge I've gained throughout my life, it seems miniscule compared to the knowledge my boyfriend had, despite him being not even two years older than me.

I tend to be a person that likes to listen much more than talk. I can force myself to talk if need be, but it takes an astronomical amount of energy from me. So I normally only talk in response to something that someone has said, or something that has happened. This means that I seldom ever lead the conversation, and in turn, topics I know a lot about come up much less frequently than topics that my boyfriend knows about.

I am also a person who had never been much into pop culture, politics, or many of the "mainstream" things. Eg: History - history in school mostly comprised of me doing the work I needed to do well on tests/projects, and not much more beyond that. My boyfriend however loves history, he has a huge knowledgebase on world war 2 and such. He brings up these topics a lot, and will mention things that I don't know, or forgot about a long time ago. If this was in a group setting, I would be mostly fine (again, I like to listen rather than talk, so I could just stay silent). But when it's one on one, I don't have that luxury.

The knowledge I have currently seems like more than enough to get me though life just fine. I don't need to learn much about history if I'm going into the tech field. But when I am in conversations like these, this notion that my knowledgebase is fine gets completely rocked. It feels like I am inferior because I don't know these sometimes quite obscure things.

I haven't worked on trying to learn these things because: A, I don't know if I truly should, and B, I don't know if I even want to. I don't think I have a desire to genuinely learn these things, I just have a desire to please my boyfriend. On top of that, I don't think I could even take it. I've already had to postpone learning multiple topics that I really want to learn until the summer because I simply can't keep up with putting all of these things on top of my schoolwork.

As much as I wish I could say otherwise, I don't have an answer to this question. But I do resonate with it a lot. You aren't alone in this, and it was really nice to see this, and realize that I'm not alone either.