Welcome to the site, and congrats on your new addition!
Is he a baby? It's very normal for babies to feel insecure. You're a lot bigger than he is, so he's naturally going to be afraid that you're going to eat him. Can you describe your set up? Sometimes one little thing in their set up can make a big difference in their attitude. I would definitely try to avoid handling him until he's eaten for you a few times. Then, slowly start to handle him for a few minutes every day (except for the 24-48 hours after he's eaten, and when he's about to shed). Most will settle down after they gain a little size and confidence that you're not going to eat them
Hope that helps!