He didn’t text me for 4 days because he said he was tired?

So this guy I am seeing - He didn’t text me for 4 days but I noticed he was showing as active on Facebook, so I pinged him a message on there asking how he was doing. He said he was really sorry for not texting me back on WhatsApp as his brains been everywhere due to being on some night shifts. I said its cool I understand and we was chatting about work a little. Now do I give him the benefit of the doubt or should I move on from this guy?
He didn’t text me for 4 days because he said he was tired?
Post Opinion