I'm seeking guidance.

I'm a guy (18M) and she's a girl (18F), and I need some advice. At first, everything was great, but she's changed a lot. She's started lying to me, and she doesn't give me much attention anymore. I often feel unsure; she acts like she doesn't like me, but at the same time, it seems like she does. When we hang out, she's usually on her phone or asleep, and I find myself begging for just a little bit of her attention. I'm wondering if she still loves me.