Today finally I had the longest conversation with a girl ever. What do you feel about it?

So as you all know I am studying MBA now and talking with several girls in my University who are mostly within 21-25 age range. But there is this girl (lets call her ST) who is already so comfortable with me even though today was just our 4th conversation. She is 24 now and I am 23 and she is from the state Chhattisgarh which is in Central part of India and came to our city Bangalore in India for her MBA and I am from Siliguri in West Bengal as you all know and living in Bangalore for years. Today I saw her sitting in the cafeteria and approached her and she asked me to sit next to her. Previously too, when I tried talking to her, she asked me to accompany to her till her classroom(we aren't classmates) but today we had such a long conversation. At times I was literally running out of topic as an introvert but she kept the conversation flowing. We have several things in common and whats cool is we both did our undergrads in engineering and now studying MBA and she also is into cars similar to me. We even followed each other on Instagram today. This was literally the longest in person conversation I ever had with a girl. I had always been shy near girls in school days and my undergrads and only recently started talking to girls but ST has been the best to me. Getting comfortable with me and having long conversations with me in just 4 days of getting to know each other. I really hope she doesn't have a bf tho so that I can ask her to eat somewhere with me. I am also talking with some more girls but ST has been the best so far.