Am I overreacting?

So me and my friend are in college. We've been friends for about almost 2 years now. But lately it feels like she hasn't been around me in general. We usually only hung out once or twice a week for a couple of hours, or at least overall consistent conversation (we live together). But lately it feels like she's been hanging out with everyone but me. Actually we did hang out for an hour a couple of days ago, but then she left to go to work. I brought it up today with along the lines of "we should hang out soon. I miss hanging out with you" and it felt like she deflected it with "I'm a busy person. We hung out not too long ago "

I responded, "it was only an hour. We haven't really hung out in two weeks."

She went, "that's why we work." Then quickly changed the subject.

But she can spend hours with her other friends? I know I may seem jealous, and I am partially, but me and her were pretty close. I would have called us best friends up until this point. It feels like she only talks to me out obligation. She's dropped hints of not wanting to live on campus together anymore

I realize we're both in college. It is a very stressful time. And I am also on my period so maybe I'm just overthinking everything, but usually I spiral before it not during. I'm an overall low maintenance friend as long as we have a stable foundation. Like the friend that you don't have to text too often but usually down to hang. I just also don't like the feeling of being a back up friend. Please tell me if I'm overreacting and overthinking everything.