I like the girl that I met on the bus?

I am asian, and caught the bus 317 around 5:30 pm on last Saturday in kotara. I saw there was an aussie girl was startling at me while I get into the bus. She was sitting at the back of the bus, and i was like sitting one row in front of her on the left hand side. I was busy checking the phone regarding bus routine and direction stuff. I didn't realize that she was actually startling at me. After few minutes, she changed her seat, she sat on the row with me, and I still didn't realize; after few seconds she changed her seat again, sat in the front of me. I was just thinking she is trying to behave funny, then I still keep my eyes on the phone. At that moment, I actually start realize that she is not just behaving funny, she might like me, but I wasn't sure about that. By that time, its already too late while I start to realize that, then I got off the bus and looking inside the bus, she was looking at me as well. At that time, I suddenly regret what I did in the bus, I should approach her. What can I do about this? How can I find her out? Please tell me how should I do, not sure if I can see her again?!