OH Happy Days and Sad Too

I have been so excited but also stressed out at the same time. This month my hubby and I got approved to rent a town home and will be moving in March 1st. Oh do we wish we could move in sooner but that just doesn't look possible. The thing we are learning is you can't push something that doesn't want to move. The sad thing is I am going to have too get rid of one of my dogs and the one I have decided on I have had for almost 14 years. Let me tell you it is breaking my heart the closer the day comes for move out day.........I am up in the air about what to do if someone doesn't take care I know she won't make it in a shelter plus they would probably end up putting her down anyways and she has never been a single dog or been by herself. So I am considering putting her down myself so least I know where she is, I just don't want her to go to a bad family. Any ideas on this matter????