It doesn't matter as long as your girlfriend doesn't feel embarrassed. It is not surprising that some couples like to sit together in college classes. If your girlfriend feels embarrassed in front of her classmates, don't go to class together. In addition, if you can have classes together, it is best not to do some intimate actions. Some teachers attach great importance to classroom discipline, and the classroom is the place for classes. It is ok to have classes together. Don't do some conspicuous actions.