New and saying hello

[~¤DG¤~]

I'm a little disappointed right now. H had asked if I wanted to get together for a little bit and I said that was fine.

5 minutes before he was supposed to be here he called and said he needed to take a raincheck.
As disappointed as I am, I didn't let him know it. I simply said "That's ok...no problem." And left it at that.
He said "I can tell your mad." And I assured him that I wasn't, and that we could do it some other time.

Of course I am sad, but I'm not going to let it ruin my evening.
It's too late for me to make alternate plans, but I refuse to sit and stew over this.
He does not define me. He does not determine my happiness, right?