<human>: Lately my girlfriend seems to have reverted to being a teenager or something. When we met and started dating, she came across as completely different from the other girls I knew. Smart. She's so smart. And she was interested in worthwhile things. Reading, especially science fiction novels, playing some video games with me. The kinds of movies and TV she would watch would be good, strong shows like Breaking Bad, Game of Thrones, Archer, etc. She just seemed like a league above most of the leggings-wearing Ugg boot girls I see everywhere. 

But now it's like she's a completely different person. She's started watching trashy tv shows on Netflix a lot. 90210, Gilmore Girls, Gossip Girl. I asked her why she would watch that trash, and she said "it's good" and she likes to look at the clothes and pretty actors. I felt my respect for her declining and it caused some stress between us, honestly. But it's not just that. Now she only reads trashy YA books, shit that teen girls read. I asked her why she wasn't reading the fantasy series she likes and she said "I don't know, this seems good to me," and the book she's reading now is called "If I Stay" and it looks like some shitty romance novel. I don't get it.

She even came out and told me that she didn't want to play the game we'd play together anymore because she, "never liked video games" and she thinks they're boring. I asked her why she'd play with me, and she said she just liked spending time with me. I felt lied to and it caused another fight between us. She apologized for lying for so long.

What can I do to get my girlfriend back? I don't want to break up with her, but I don't want to stay with someone who has the interests of a 16 year old high school girl.

Can you give me a shortened version of the text?
<bot>: smart girlfriend has completely changed interests and now reads, watches, and is interested in the stuff 16 year olds are. What can I do?