An oral or verbal agreement like this is effectively unenforceable, since there is no "consideration," or something of value given for the promise to pay you support. This means that the agreement is not a contract but merely a "gratuitious" (or freely made) promise, and the law does not enforce such promises. Furthermore, it would be hard to prove the existence or terms of the agreement if your husband denied it, since this would then be simply your word against his, or "he said, she said." Speak with a family law or divorce attorney: to be sure of support, you may need to file for divorce and have the case settled by a written divorce agreement, or else get a judge to order support.