Yes, I have gotten tired of a quilt before I have it finished. I don't know if you have more than the one project going, but I usually find that if I have a little variety it helps to get the larger project done. Maybe set a set amount of time each day to work on your queen size quilt, and then give yourself another amount of time you can work on something else. It will be worth your effort once it is done...and as you get closer to being done it probably will get easier for you to want to finish it.