Some jobs require that a person work shifts or long hours so they are tired during the times most people are awake and alert. If this is the case you just buck up and deal with it. You try to arrange things so you can be together as much as possible and appreciate those times. An accountant however does not seem like that type of profession. I would ask my mate if they could work fewer hours to spend time with me and/or schedule some time off so we could be together.