Age at the time is an issue. If over 18 at the time you could still use whatever state law statutes are available including a OP. Check with a...

If you didn't have the state of mind to sign a document it can be voided, however the burden of proof would be on you................

Hire a local attorney and have the attorney review your agreement and advise as the best course of action.

Many types, contact and agreement attorney, litigation attorney or general practice. Google them in your state or in here.

Hire a lawyer to review your agreement and give you advice based on what it says.................................

There is no bullying law in Illinois nor general harassment law...............................................................

Yes and hopefully he has some money or collateral, Sue the co-borrower for contribution. A court could make the co-borrower pay you half of the...

You lose all leverage and ability to change any terms once both parties sign the agreement. Hire a local lawyer now.

You need to take the written agreement to a local attorney. if it is only oral, you are going to have a problem--you might have a problem anyway.

Take your signed agreement to a local lawyer for review so you know what you can and can't do. Best of luck.