Thank you. I will see if I can scrape up the money to take him to the vet. Maybe my parents will help out. Thanks for the advice.
Does the fact that he's an indoor cat make any difference?
It is time to take your cat to the vet to determine if this is behavioral or physical. Often sudden behavioral abnormalities have physical causes. Ear mites, flea allergies, anal gland problem, urinary tract infections, hair balls, etc. can cause bizarre behaviors.
For flea allergies, the actual flea is never seen. The flea can bite your cat, jump off, but can result in itching for a month.