Hey there Chipper.

I don't think it'd be unusual at all to be a little grumpy if you were anxious or nervous about your evening with this guy. It's rather normal to be short or a little grouchy if you're nervous. If I were you, I'd just try to realize when it's happening and rein myself in. You recognizing the cause is a great start to that.

I hope I was of some help, and I wish you the best with your friend.