People who really love each other don't get divorced over things like that. If that is what he is telling you, then he isn't speaking the whole truth. There are other much bigger issues going on. He may be seeing another woman, or he may have simply fallen out of love with you. Using "not being able to cook", something that can be cured by reading a cookbook, is just a shallow excuse. You asked another question about being divorced for "childish behavior". You are only 20 years old. I think you married too young, and your husband has realized you are not ready for such an adult relationship. Your husband can divorce you for a million different reasons and lump them all under the blanket of irreconcilable differences. You have a couple of options. One is to grow up. Use the computer you are typing on to look up recipes and learn how to prepare edible meals. Stop behaving childishly and realize that a marriage is serious business. Or, you can let him divorce you and wait until you are really ready for the responsibility of marriage. I am not trying to be cruel, but that is where your life is at.
I hope you can make a decision that is best for the both of you and that regardless of the choices you make, that you end up loved and appreciated and cared for.