How to fix a marriage after you cheated and he forgave you?

I cheated on him over lack of sex and he just told me I understand why you cheated. And he wants a second baby a boy we have a girl but today he said he wants a boy and we been kind of trying for another baby he came inside the other day after months without him doing that our daughter is one years old I love him he is the love of my life but I still feel guilty. He always worries about me eating but sex is something that has always been important to me. I love him but I cheated over lack of sex we did have sex but not enough as I wanted that’s why I cheated.