How can you be sure your boyfriend loves you if you're not allowed to be together so he can't always say he loves you out loud?

Why are you together if you are not allowed to be? You should ask why it is not allowed and accept the reasons given by the authority over you. If you do not you may just find out the reasons were right and wish you had obeyed. If you want to know if he loves you at all see if he will put your needs ahead of his own. See if he will care more about what is good for you then what is good for him. That does not take words. If he is there for you as much as possible and when he looks at you, he looks at you like your a million dollars. I am in the same position as you. I know how if feels. I hope everything works out for you to. Just be careful! Good luck, Renee