Liz, We didn't have to give each other injections in Nursing School
, but I was a Navy Corpsman years ago - we learned on each other. Trust me, it's much more nerve wracking trying to give a shot to a school-mate (someone you know, who might critique your technique) than an actual patient.
Prepare yourself (take a few deep breaths) - don't let the pt. know you're nervous, or they'll tense up and the injection will be more painful. Chances are, your pt. has already had the injection you're about to give - insulin, etc. and know what to expect. Just steady your hand and don't hesitate, do it as quickly as possible. Once you give your first one, you'll get the hang of it and do fine. Don't be so nervous that you forget to dispose of the needle in the sharps container ASAP to avoid a needle stick. Best of Luck, Sue