Ending things with my fwb

So I’ve had a fwb situation with this guy since December last year. It’s been a bit weird in the sense where we were talking almost everyday, and it wasn’t just chatting when we wanted to hook up. Anyway due to rona we’ve been in lockdown and haven’t seen each in almost two months. Our communication has definitely decreased we rarely talk at the moment purely because there’s nothing to talk about.

Over this time I’ve realised I don’t want to continue fwb anymore just not feeling it anymore tbh. Anyway I don’t know what to really say to him when the time comes to “meet up” again. Like I don’t want to be rude and I really don’t have a reason just I don’t feel like it anymore.

Anyone able to help with something to say in a respectful way?