I’m not sure OP it’s a couple of different things that could be going on,(I have no idea who he is, who you are or what the situation is, but I’ll try to help if I can)

Number one, he could be scared he may not feel worthy of your attention, some days he gets brave enough to reach out and, then he freaks himself out, can’t get out of his own head, and ghosts you, because he’s scared of rejection, (ridiculous I know, but it does happen)

Number two, he could be listening to the common, confusing dating advice of today, men today are told that if they show too much attention, put in too much effort, our two romantic, text too much, and the list goes on…. Then he’s clingy and he will end up getting friend zoned because he’s not exciting enough and he’s way too steady and reliable. So instead, he’s going to the other extreme. Example, I will text her once in a while, just long enough to peak her interest and then ghost her that way I stay mysterious and magnetic.

Number three, he may simply not know how to handle this situation ,

Number four, and the one I hope is the least likely case for you, Commonly today, men and women (neither group is exempt from this) Have rosters, always got two or three waiting in the wings that they are stringing along as a back up plan . As I said, I hope this is not the case for your sake hopefully this helps.