Girlfriend telling me to she wants to be left alone? HELP?

I’m 21 my girlfriend is 19 we were best friends for 3 years. Now we have been together for almost 10 months.
In the beginning it was an awesome relationship. We’d be ourselves, show each other affection, etc.. Now my girlfriend is telling me to leave her alone and that she just isn’t happy in general. But, I ask her if she still loves me and she says Yes. She’ll still kiss me when I ask for kiss. There’s 7 days in a week out of those 7 days we see each other for 4 Days the other days are school & work.

She says she wants to have alone time which I feel like she does get but she still wants alone time even when it’s time for us and I hate it because when she gets in her “Leave me alone” mood she’ll ignore me and just be on her phone scrolling through social media. She’s even told me to go home after I travel an hour by car to see her. And she recognized that it’s messed up of her to say that but that she wants to be alone. I hate it because she has it like a Queen with me. I’ve never done her wrong, flowers every month, great relationships of benign with your best friend. And she says she recognizes it all but says she wants to be left alone. And that she was happier before me because she got to be alone. I’ve been fighting with her for days over this I don’t know what else to do. Any advice?
Girlfriend telling me to she wants to be left alone? HELP?
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