This guy that I work with has known me for 2.5 years. Even though we've worked together that long, I never really knew him. He recently asked me out. We went out to lunch today, and we took another coworker with us who is my bestfriend, as moral support. Anyways, when we got back...she pulled me aside to give me a couple pointers. She told me to cut down the swearing and to not put myself down around him so much. She said..."that's not you...you don't swear." She said, "just be yourself!" Later in the day, I was complaining about a certain person that just sold me a car recently around him. Well, he told me that he knew the guy and he was a good guy. That's all he said.
Could I have screwed this day up anymore?!

My friends tell me that I am reading too much into things...to just relax.
I am just feeling reeeeaaally vunerable & stupid. I've never had anyone just like me for who I am before. If this guy still likes me tomorrow...it'll be a miracle. I was fine around him until I found he liked me and now I am just messin' up left and right around him. My friends insist that he's still interested.
How do I "get a grip" and start playing it cool around this guy?