So I (26M) have this co-worker (24F) who I’ve been working with for the past two months. Her behavior at work seemed super flirty. She laughs at all my jokes, and sometimes squeezes my arm when laughing, brushes up against me on purpose, calls me her boss(even though we are the same position), shared with me personal issues like her stalker, as well as personal health stuff and her menstrual cycle, offered to buy me a new coffee mug even though the one I had was fine, offered to bring me home cooked food, always gives me a ride to my car, etc. We even spent like an hour and half in her car just talking a few weeks go. I could go on but I think you get the point.
After all this, at a certain point, I also started to like her. However a few days ago, I found out she has a boyfriend (she herself mentioned it) and now I'm super confused. Was I wrong in thinking she actually liked me, or was I completely mis-interpreting what was going? I feel kind of stupid for this