Ghosting?

So me and this guy have been dating for about two years now. He never seemed like the person to ghost me but it’s been two weeks now since I’ve heard from him. I’ve called but the phone just rang with no answer. This is not the first time he’s done this. The last three time he disappeared was for about four days but he would text within those days to let me know he was okay and he always said it was because he was going through things and didn’t want to burden me with it. Am I being ghosted? If so what should I do.