It’s impossible to tell from your question if you’re bored with school, stressed by school, or if you’re actually suffering from a clinical depression. But, whatever the reason behind your lack of motivation, I think that as soon as you read this message you should get yourself to your college’s counseling services. Almost every college has professional therapists on staff who will be able assist you (at no charge beyond what you’re already paying for tuition). This counselor can help you to sort out why you are so uninterested in your work and what your next steps should be.
If you don’t complete your classes, you will lose all the money that you’ve spent for this semester as well as the credit for the work you’ve done so far. It’s also possible that you will not be able to go back to school in the fall, even if you want to.