I am a nervous wreck when I'm around him!!?

I really love this guy, and he's hinting that he feels the same way too.
I am usually outgoing, funny, smart, you know. But when he appears - bam. I'm dead, lol.
I tried taking deep breaths when I'm around him but that works for about a half of a second and then I get nervous again.
Yesturday I did manage to crack a joke, though, and he liked it. :] That's a huge milestone for me.

So, what are your tips for not being a nervous wreck?