I'm afraid she might not like me, but i'm not sure

We used to talk a lot on instagram, but after i made an weird question (do you like talking with me?), she just stopped replying. She is really shy and so do i, but she seemed to lik talking with. She always laughed and expressive when she talked, she always asked me about my life and and when i made a random joke, like talking in a different language for some reason, she went with the flow without asking and them we laugh about that. I loved talking with her and knowing more about her, we have a lot in common and i felt like i was finally been understood and noticed by someone, so it really hurted me when she just stopped replying my messages.

I saw her in person one time and i thought she would think i'm weird or hate me, but she was smiling, was really kind and when i leaved, she wasn't cold and talked a lot, insted of just saying "bye". This made me think that she doesn't hate me, but she still doesn't reply me. Maybe i made things too ankward and ruined the vibe of our conversations, this made me really paranoid that she might never want to talk with me again.

I might see her irl soon in her birthday, i'm really nervous and worried of how she might be. I'm too much of a coward to talk to her irl, i get really nervous, my heart hurts and my mind turn blanc. I understand if she don't see me in the same way i see her, of course it would hurt, but it would hurt more if she say she doesn't wanna to talk with me again. What should i do?