How do i get my S/o to ask for sex

My bf want sex and i know it but he wont ask i either have to offer it or ask him nd of course he wants it. If i dont initiate or ask hell sit there like where littile kids waiting. Sometimes i wish he would just say get naked or ask me to please him instead of me. Am i overexaggeratting about not being asked? I already told him he should start taking intiative i dont get why hes scared i almost never turn him dowm