It took Noah 100 years to build the ark. You know there were people ridiculing him the entire time. On the 99th year, 12th month and 30th day, someone probably commented, "Look at the fool and his boat that will go nowhere.". .... And then.... a single drop of fain fell.. then another..... Suddenly, the fool was no longer so foolish and the boat was no longer going nowhere.
If God has placed something on your heart and you KNOW it was Him.... that He has confirmed it many times over.... don't resent the wait. He is doing something in you in the process. Don't just rejoice for the promise, rejoice for the trials on the way to the promise. The rain will surely fall, in it's due season.