Or

You can go to another college to take that class.

Generally speaking, you may not take classes at another college once you reach a certain number of hours (often 90) as you must complete the last 25% in residence at your college. There are exceptions though.

Sometimes, when you need a class to graduate and it’s not available, you can petition for a substitution. If you need a certain literature class for example but it’s not open, you can often get permission to substitute another literature class.

Sometimes too, you can take a class as a directed study or online if it overlaps another requirement.

Plan your year carefully, this is not an uncommon problem at many schools. Get any substitution permission in writing.

It may be possible that you can take some of the classes at another college or just during the summer, but it depends on which specific ones you are considering. Again, talking with a major adviser is critical.

I hope it works out for you.

May God bless you.

Generally, seniors or people about to graduate get first priority when auditing a class. Often, you can go to the dean and request that he make an exception for yuo to join the class, even though there is not enough space. Tell him you don’t care and will sit on the floor. Do what you have to do. Be aggressive.