Go to the library with your girlfriend, you can sit next to it or opposite it, depending on what you think. In fact, in general, sitting next to you feels more like a couple than two strangers, because sitting opposite you may feel like strangers, because the words opposite you are not easy to communicate, but sitting next to you is more smooth to communicate. If we sit opposite you, it usually feels like business-to-business or a formal conversation, but if we sit next to you, it is more casual, so you can whisper, so I suggest you sit next to each other. If there is any movement between you, it is best to suggest that you sit together and next to another person.