I expect my ex to stay true to what I thought was a promise he made me.
What was this promise that he made?
He promised me that he will come to my house right after work.
I can understand how you like people to keep their promises. However if he is your ex and he promised this when you were together, he shouldn't have to abide by that now. I would double check with him instead of just hoping.
Well, I'll see how it goes.
I think that you should wait until he gets off of work before you should react. I think that it is understandable for you to want them to keep their promises.