Girl's Behavior

She seems to be losing interest. What do I do?

Just last week, my girlfriend was always enthusiastic about calling and talking. Now, it seems like she couldn't really care to do so. Her texts are a bit far between, which she has a life and I get that. Just when she does finally message me it isn't what it used to be. Yet when we met up last night she was a bit like how she always was. She says a lot of stuff that seems like she's still here in the relationship. Maybe I am looking far too much into it. I just know I was in a relationship where she knew how to say all the right stuff but didn't mean any of it. I guess I am a bit afraid that her interest is waning or something else is happening. She doesn't tell me nearly as much as she once did. It became a lot about sex for a bit. She also did say it was scary how much she felt for me already. However, it isn't a bad scary and she likes it? I don't know. Mostly venting here. I know I just need to talk to her more than anything. Meant to last night. It's just that things felt fine and it went really well.
Updates
11 mo
Pretty sure something is up. One night she said she couldn't talk until later due to class and her doing class at her cousin's. I don't doubt she is telling the truth here. However, it's odd she told me that. Yet the next day after class she just starts cleaning and doesn't tell me she can't talk until I message her saying I hope class went well. Like, I don't know. I just wish I could talk to her tonight and figure it out one way or another.
She seems to be losing interest. What do I do?
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