I’m afraid to tell him what I want


My boyfriend and I work and go to school so we barely see each other maybe once a week on Fridays if we are lucky. We haven’t had sex in a month, you guys might be thinking that it’s not long but for this girl, feels like a year. We are super busy with school and what we mostly do is go out to eat or watch a movie and go home. Last week I so wanted to have sex but he said he didn’t and when he told me that, I said I didn’t want to either. Today is another Friday, how do I tell him I want him without sounding desperate?