Did this girl lose interest in me?

I’m a hs senior, this girl is a junior. I had a class with her last semester and felt like she wanted to be friends because she would always make eye contact with me and avoid sitting next to me. Which I took as shyness. We didn’t talk much except once in class, but it was a very fluid and nice convo. Later, she’d still look at me in the halls and started saying hi. She would also sit at my table in the library, but neither of us would talk.

Anyway I am really socially awkward and had trouble striking conversation with her whenever I wanted to. Now, unlike before, she doesn’t look at me or say hi in the halls. Like she used to seem focused on me but now I’m like invisible. Is it because I didn’t do anything to befriend her? Or she suddenly dislikes me for some reason.

I’ll note I am not interested in pursuing this girl — I have a partner. I just feel drawn to her for some reason and think we’d make good friends.