Me (M21) and her (F19) am confused on how to look at this thing we are in

Hey,
Me and my batchmate starting talking like a month ago and we are batchmates since last year but i felt like talking to her finally, we started chatting and the next day we started meeting daily after college spending time and knowing each other, but then i get to know from her that she is in relationship which she says is a commitment like they'll marry each other type shit but then she cheated on him with me, and she started confessing her feelings to me and i did but we still call each other friends like dont act like my girlfriend we're still friends. What do i do in this situation? Should i just keep going not getting too attached or anything or wait for her to end things and then see how we end?