Meeting my long female friend after 3 years. What should I do tomorrow?

So basically she was my female friend. We are friends frim 7th grade and after 12th grade we stopped talking. And after 3years we just started to speak in social media and call some time. She was my best friend and the close She getting Im feel in love with her. I like her so much , but she don't knew i lover her. After a long i got a chance to meet her tomorrow.

I feel insecure rn. And we both are introvert. I don't know where we can go. What should I do tomorrow.

Again it's not a date

Im thinking how tomorrow gonna be.