HELP!!!! How am I supposed to cook?

My girlfriend called me this morning and said that she was comming this eavning. I asked her what's her favorite food and she said spaghetti, and I was such a DUM A*S that I said that I was going to make the spaghetti and that it was going to be ready by the time she came. I don't even know why I said that!!! I can barely make a sanwich!!! I don't even know how to cook!!! Now I can't say no because I don't want to disappoint and not only because of that, she also invited some of her friends to come!!! HELP! what do i do?