In a sex rut with my SO...

My boyfriend and I aren't having sex at all for the last 3 weeks have been nothing with our jobs we really only can have praviate time on the weekends and even then we like to relax. I'm not sure how to spice it up I try to talk about it but he just laughs and say let's do it. I need some romance I can't just say ok I'm ready like him. I love him with all my heart but he isn't romantic he just pulls his thing out and says lets get it on and that for me is the BIGGEST turn off ever. How can I get him to want it more.