Well, she's a single mother who's working long hours, and you're a full-time student. So as unfortunate as it may be, the reality is that you'll have to make the best of what you've got. That's still 4-5 hours per evening, Monday through Friday... fill up that time with fun activities! Maybe you could prepare a nice dinner for two, once per week, and talk about what's been going on in your lives while eating. You could also have a movie night (either rent something or download it onto your computer), and a board/card game night, etc. You could also help her with chores around the house, or offer to help her with other errands, such as shopping for groceries. That will both reduce her stress level AND give her more time to spend with you later on. =)