Is something happening between us?

I'm taking Honors Chemistry as a Zoom class, and was assigned a partner for break-out rooms, Erin. She's really snarky and competitive. Easily stressed. Two months ago she couldn't stand me. But as time went on she seemed to grow fond of me. 

We meet in person more often, when at first she didn't want to. Now when she's tired (which is often) she'll sleep on my shoulder or sit in my lap. We got into conversations about non-class related stuff. Like what music we listen to. Turns out we have practically the same political views. She vents to me about bullies and exes, who picked on her for getting good grades and wearing glasses.

This was how I found out she smokes pot, to help her relax. She got defensive but I wasn't judging, I told her I'd never tried it and asked if I could, so we shared the joint. We listened to music and went out to sit in the hot tub in our underwear. (Well, we were high...) I gave her a shoulder and back rub. She talked about being self conscious with her body, primarily her "huge, awkward t*ts." (Her words) Erin always wears flannels and jeans, never shows off skin, so it was definitely a bonding experience. She seemed a little flustered the next time we met in a breakout room, but since then we still talk and work together and it isn't awkward.Is something brewing between us? My friends seem to think so. They think that Erin has a crush on me or at least wants to hook up with me or something. I dunno if that's true or what I should do if it is?