Never really had to deal with this before (which, after goin through these forums, is kind of hard to believe).
Set up a date with a cutie I met on OKC. I hadn't messaged her in a while, and when I did again, she recalled some of our cutesy roleplay and sent me a photo of her in a bra and panties. I took that as an IOI.
About a week of talking over text, then set up a date for tonight. I was even on my way there, and she said to look for a girl in red flannel. A couple minutes after that she texts me that she won't be able to make it, will let me know if she's freed up, she's "so sorry!"
Wasn't sure what to do... I was a little pissed but didn't want to come off needy, but also didn't want to make it look like she could walk all over me. So I ignored it until I got back home (about 25 minutes) and said "It happens. Hope everything is okay." Half hour later she says "Yeah takin care of a good friend. Known him since 7th grade."
I haven't responded to this and don't plan to. My plan is to freeze her out for 2 or 3 days (unless she texts me first) and resume as if nothing happened. When I plan a date again, maybe I'll playfully say something like "You can make it up to me with drinks on wednesday, your treat

" just to retain my value, but to me that sounds a little douchebaggy. Dunno.
How do you guys think I handled it, and what do you think about my plan going forward?