willows, at least in my region, flourish when near water, lakes, rivers, streams, and the likes, but when in a back yard they have a hard time finding and soaking up all the water they need to live. Thus, they become shorter lived than their lucky partners near water sheds.
Your tree should have already had buds and new whips developed.
If you have the budget, call an arborists to check it out, but if other same species willows in your area are budding out and growing, then yours is probably dead or beginning the process.
Again, very hard yet impossible to diag it over the Internet.