Do you know the variety and what zone do you live in? Many of the weeping cherries are not all that hardy, but generally they will have good leaf growth but the buds can freeze and die, usually late in the winter. If you are in a northern zone, many cherry trees have not leafed out as of yet but they will in the next couple of weeks. If the tree does leaf out, you may get buds next year depending on the windchill during the winter.
The Yoshino cherries are notorious for having their buds die but the plant lives each year. You may want to try "Snow Fountain" as it is very reliable with respect to budding.
What color are your buds when you have them?

Yes: it sounds like it froze. Cherries may also fail to bud out if they have gotten too wet at the root.

I had the same problem this year in Central PA. Don't give up! I am hoping for a good blossom next year!

We are in NJ. Yes we did have a sudden freeze and then all the rain. Keeping my fingers crossed. I don't care about the blossoms this year just hope the tree is not dead. It is a beautiful one.

Thanks everyone ...you gave me hope:)