Simple advice. Work with your boyfriend and understand the tasks he wants you to perform when you are about to dock. I am assuming he will be at the helm and you are being the helper for the docking.
The first few times for new people are always difficult. It is the responsibility of the skipper to go step by step and provide instructions that are easy to follow. Sometimes there maybe sudden changes in strategy required based on what is happening and the helper needs to be flexible and follow new instructions without panicking. Just have faith that the person giving instructions knows what they are doing.
Trust me, it only gets better with experience.