Is a promise you make to a star while drunk necessarily binding?

If you are drunk and you are wishing on a star, and after stating your wish you begin to ramble about some things, and you end up making a promise that at the moment you make it you would like very much to keep, even though in a few years you might feel differently, are you bound, in the morning when you are sober and better able to consider the consequences of such a promise, by that promise, or are you morally permitted to add certain reservations to that promise, so that is no longer as absolute as you first it when you first made it?

Note: I’m NOT talking about a situation in which a wish is made where the promise is dependent on the fulfillment of the wish; e.g.: I wish to win the lottery, and IF I do THEN I promise to donate half to the Red Cross. More like: My brother is sick and I wish for him to get better. Oh, and by the way, I promise not to steal out of his piggy bank anymore.
But something much more significant than those situations.

This is a serious question. Whether or not you believe in wishing on stars is irrelevant here. What concerns me is that I’ve made a promise to myself (with a star as a witness.) How much leeway do I have in reneging on that promise to myself if I should ever find myself in a place where I either can’t or no longer want to uphold that promise?