I took my girlfriend on a beach trip
Did you want to go by yourself?
Not likely, people would probably lose respect for me if I acted this way.
It is normal to do things that you want others to respect you. Thus you are expected to travel with your signification others. It is good to go on vacation with them.
I'm not letting her leave my side the entire time.
You are such a sweet boyfriend! You and your girlfriend deserve a relaxing vacation, and it's wonderful you made sure she's okay all throughout. You two are going to have great memories.