My gf and I made plans on Thursday for tonight (Sunday) to go for dinner. Good..that's all said and done. I clear the night to spend time w/ her. Saturday rolls along..and we talked. Turns out she has plans w/ her friend to do a photoshoot for somebody. Ok..she invites me..but turns out I am not allowed to attend. Ok..fine..so I hang out w/ some buddies..10PM rolls around and she texts me saying they're going for drinks. At this point..I just text her saying "I'm not going to see you tonight". That's it. I leave buddy's house, went for a little drive..came home. She left me a vm saying she's home..and I'm not picking up my phone..and she might just go to bed.

What's should I do now? Should I call her back? How should I handle this? I'm the type of person who likes to stick w/ the plan..and this pretty much had to make me come up w/ last minute plans for myself..Ugh..I hate that.