Cuz im a dumb kid

Hello people. Im new here. So well my problem is me. Totally. Im not good at talking with people. I am an introvert of sorts. So 2 months back this girl and I had a problem at the airport, we are from the same school. Then after the problem was cleared off we texted each other through fb. But then we met in school and my introvert part kicked in. I kept trying to stay away from her. So she thought i was ignoring her and is ignoring me now. And when i say i chat with her thats just small talk. Like- sup, wyd. And all the other starter things. We have done that a lot of times. But even the convo goes nowhere.
And so i have no idea what to do now. I feel like im going crazy.
Yesterday morning she texted hiii at 4:21am after the lil chat we had the previous night. Then i took time and responded later by 6 when i woke up. But she read and didnt reply. You all may feel like it aint nothing but there is something wrong. I need help.