feeling like the walls are coming in.....

I am suppose to be having a small get together on sunday. Its really throwing me threw the loop.
I have invited a few of my friends and some of my sisters friends.  I also had invited a facbook friend who lives out of town.
Truth is, I am really into her and like her alot. She hadnt confirmed until yesterday. Then the anxiety level was very  high. I could barely sleep las night. So this morning I had to tell her I was feeling very panicked about her coming and that i didnt think i could do it. She said she understood as her daughter deals with anxiety issues as well.  Now. I am scare dtaht her intial thought of me will be different.
Part of me thinks I jumped the gun. Maybe expecting us to hit it off and well....more.  But now I deel like I have lost the chance and that chances are next time she will say no.

Now, I am beginning to see i have a real hard time meeting new people. And I really dont know how to get over the feeling of pure fear.