I am 29M and GF is 25F. My girlfriend sometimes gets mad our relationship is all about games.

She wants me to talk about stuff with her but I have to be the one to come up with topics. I ask her directly... If she wants to talk about something we can talk and she tells me that she doesn't want to talk to someone that doesn't care about her...
We share many hobbies, games, music, watching movies...
We are in a long distance relationship so our options are limited.
It's very hard to find topics to talk about every single day since we are together a lot so I usually try to do something else with her since we share those hobbies.
She usually just needs a bit of time alone and then she is fine again but still I can't help it to get worried that she might get tired someday.

TLDR; She gets annoyed I don't care about her which I do and she wants to talk about stuff but we don't have that much to talk about anymore.