Is it normal for me to be so frigid with my boyfriend?

I'm 13 and i'm in a relationship. It's only been 2 days. But I feel so frigid. I can't look at him in the eyes when I talk to him:( I've never brrn in a proper relationship before, and he has. So I am pretty nervous. I've held his hand and hugged him, he's with me all the time. I feel scared and wish my friends are near when it's just me and him. Please help, I really do like him but I don't know what to do!