Ok, here's the thing, based on my own personal experience, unfortunately spending lots of hours in the kitchen cooking for your boyfriend and chopping vegetables is not going to make him love you as much as he would if you spent that time dressing up and making yourself look pretty or doing something you enjoy.
I am not saying never cook, its nice to surprise the people we love with a meal. But cooking everyday can take hours, often for nothing. Recently I spent two hours preparing a meal for my boyfriend and he didnt even taste the food because he had had dinner at sports, and I am a fairly good cook. If you absolutely have to cook, use meals that are evry simple to make, like buy vegetables that are easy to cook