AIW for sticking to my original plans?

My girlfriend had plans to go out with a friend all day today. They were going to a nearby city to look around the shops etc then 

 going for food then a couple of drinks so I planned a nice day for myself. I 

I planned to go into town and grab a coffee at a coffee shop I like and spend some time reading in there then go to the cinema as there’s a film i d been wanting to see then I was going to go to a bar I like bad have a drink. 

My gfs friends cancelled this morning so my gf asked what we could do today. I reminded her I already have plans for today. I said she’s free to join me but I won’t be e changing them. 

She mentioned having no interest in the movie I was going to see and not wanting to go to the bar I was going to so suggested we choose something else. I again said no and reminded her that her plans changing shouldn’t force mine to cancel and that I was looking forward to what I have planned. 

AIW for keeping my original plans?