First Date HELP

I’m 17, with no guy experience. Never kissed a guy never dated one. This guy that i’ve known since elementary school asked me on a date and I said yes. I’ve always been interested in him but he had a girlfriend for the longest time so I just pretended like he didn’t exist. I’ve never had a class with him since elementary and we didn’t go to the same middle school so when I saw him my first day of freshman year I was praying I wouldn’t have a class with him. And it worked because I haven’t had a class with him. In 10th grade he somehow got my snapchat, but we never talked until the summer. We started streaks and then lost it. He’d flirt a little but I never flirted back. I’m in 11th grade now and he asked me to start streaks about a month ago. About a week ago he broke up with his girlfriend or she broke up with him, i’m not sure. Anyway last night he texted me asking if I wanted to hangout and watch a movie... I said yes. I have terrible anxiety and just looking at him I get so nervous. I can’t catch my breath lmao. I don’t think I can talk to him without sounded shaky or my throat closing while I speak. I don’t want to completely embarrass myself, I’m so scared. The date is next week, please help me. How to I calm myself? How can I speak clearly? How do I keep the conversation flowing?? I might just die.