How do I let my friends with benefits guy know that I want to see him soon with out sounding clingy?

My FWB and I usually get together when we aren't busy and have one of house places to ourselves. We both have been really busy this week and haven't been able to get together. What would be the best way to tell him that I want to make plans for the next time we're both free with out putting too much pressure on him? I just feel like the last two times I invited him over he was at work ... I'd like to ask him so he feels like it was his idea.