Tricky situation with this girl. Anyone have ideas on how to navigate this?

Girl I was with has a boyfriend I think.

To give you some background, I’m a 22 year old male in college. I’ve been pretty unsuccessful in my endeavors with women, I had one gf through high school and have been single for four years.

Fast forward to last weekend, my friend hits me up to go hang out with her, her bf and her cousin (whom I’ve never met before) from our initial interactions she was holding my hand, touching my arms, and I’m like wtf is happening? Girls never initiate things in my personal experience (not much experiences though lol) we had some good conversation going and when we were on the couch late at night she put her leg on me and we kept getting closer, so I thought she’s giving me signs, fuck it. I went in for the kiss, she started jacking me off, I came, and then I went down on her, it all happened so fast. This girl is Latina which I kind of have a weakness for and she was initiating things pretty fast, this girl is perfect and I’m a five on a good day so I was confused by this too. We then slept until she had to leave in the morning (she lives an hour and a half away from us)

I then happen to question, why so fast? What’s going on? I find her insta and I see a guys name in her profile. Is she dating him? Why is she going for me? Has she been with others?

I don’t want to overanalyze and she wants to come back up to our college and stay with me on weekends, I don’t care if what we have is more casual but it feels weird that she hasn’t told me about this guy, I don’t want to get in the middle of something.

What do you guys think I should do?