HELP ON GUY BEST FRIEND!!

so one of my good guy friends and i had sex and started hanging out a lot and talking all the time and he just randomly stopped talking to me about 4 days ago out of nowhere and idk what to do. He told another one of my guy friends that he “doesn’t think he should be talking to me right now”

we were so close and i don’t know what to do idk whether to just drop it and give him space or if i should text him in a few days- a week and be like “yo r u okay”

someone please help me