Spicing it up?

Okay so my boyfriend and I haven't had sex in about a month and 3weeks. I mean its not like I'm counting the days... I had been dying 😵 becuz I'm craving for him all the time. Like some days I just want to tell him I want him and that I'm alone at home or something. The reason why we haven't had sex for the longest! Is becuz we're both always so busy. But I want to surprise him one day when I find the time. Are there any positions we should try out? I really want to spice things up.