I can relate a little bit. I feel really drained some days, and just want to quit everything and sit in my room crying. School is draining, with there being lots of people, many demands being placed upon you, social anxiety (at least for me), and so on. But, I've set goals and I want to reach them. If you're not enjoying a class, just endure it and get it over with. Perhaps you might consider getting tutoring for those classes you're struggling in. And also consider getting accomodations through the DSPS if you haven't already. I hope things get better for you.