Inner conflict

So my general intellectual feeling is that I want humans to do what they want to do. Normally I’m good with that, but I got all fussed up inside when the following happened. I asked my girlfriend to dinner with my child (16 yr old) and I. She said at 8:30 am in the morning that she was way too busy to do that for dinner. When I spoke to her at 5:00 pm she was going out with another friend and I felt my insides go into a total misalignment and I knew I needed to get busy. I feel stuck on this one and truly want her to do what she wants without my insides getting fussed up.