I understand what you mean. A couple of years ago Master went up to MI for His cousin's wedding and to visit His family. He was only gone a week, but it felt like He was never going to come home. He took the cell phone with Him and this was before W/we had DSL, so I couldn't go online to vent to my friends how badly I missed Him, because I was afraid that I'd miss His call.
Master loves to play with my hair. One day while I was at work I was in my office and a couple of my employees was in the room with me and one of them started playing with my hair and I just burst into tears, because I was missing Master so much. He had given me tasks to do while He was gone and I was to report to Him every day when He called me. The tasks helped, but they also just made me miss Him all the more. But one thing that kept me going was to remind myself how proud He would be of me when He did come home and saw for Himself how well I'd completed the tasks assigned to me.
I know that it can be difficult, but keep as positive as you can. Keep doing what He commanded of you before He left. Mark off days on the calendar and keep telling yourself that soon He will be back home to you.