<human>: Condense the text into a few key points

[23/f] So I've always been really shy and used that, among other things, as an excuse for not starting a relationship sooner. Last week a guy (21/m) that I had been talking to for a few months asked me out, after a bit of back and forth. We had a date on Thursday where we pretty much spent the whole day together. Part of the way through the day he held my hand which led up to him giving me a goodbye kiss at the end. It was my first kiss (I know late bloomer) so I was a bit embarrassed, but he was real nice about it and it seemed that everything was good. However, over the next couple days I've felt like serious crap. My heart beats really hard, loud, and on occasion really fast no matter how much I try to relax. I have random fits where I get pale, shaking, and panicky for seemingly no reason. I can't sleep without taking something. And I haven't really eaten much since Thursday because just the thought of eating makes me feel nauseous.

I really actually like this guy so I don't know why I feel this way. I'm meeting up with him again today, we've seen each other a bit but haven't really gone out since the first time on Thursday. He wants to take me out to dinner but I don't think I'll be able to eat anything, which would defiantly seem rude. I want to tell him what's going on yet I feel like I shouldn't start the date like, "Hi. Nice to see you. By the way you make me feel sick." First of all, I don't want him to think it's his fault. And second, I feel like he may not understand, hell I hardly understand. 

I'm afraid that I may end up so desperate for the anxiety to go away that I'll push him away to get some relief.

I was going to post this to /r/relationship_advice, but I can't seem to form a decent question.
<bot>: My first real relationship is causing me to develop some seriously bad anxiety that I've never experienced before. I'm trying to figure out how to tell my date, and what to do if it won't stop.