Best friend drift?

this may sound stupid. but recently my best friend and I havent talked to a while (we last talked Tuesday when I checked in on him) and I just have a bad feeling that we are drifting apart. I may be overthinking cause its fine if people need space and not have a clingy friendship. And I know its not about me, but I feel like I did something wrong because I usually bottle up everything so I ding burden him. so maybe its partly that. I just don't want to lose him and I don't want to do anything wrong if he does need space