Om Swami
Is it normal to feel hurt when my partner breaks a promise to me?
Hurt after a broken promise is natural
If a promise, spoken or unspoken, is made and then not kept, the other person naturally has a reason to be hurt. It is quite normal. Whether this applies depends on the case and the context.
But if you have made a promise, spoken or unspoken, to somebody, saying you will do this thing, and then you don't do it, they naturally have a reason to be hurt. It is quite normal.