Yes, you can! If it will make you feel more comfortable, feel free to bring someone along. If you are not of legal age (18 year old in Belgium), I even insist that you bring someone along because there will be no shoot if you are not escorted by a parent or legal guardian. I prefer you bring a female friend, your sister or your mom. It is my experience that having a male escort on set is distracting. Especially boyfriends can be a big distraction.