I see my gf 3/4 times a week. (We live 10 minutes walk away from eachother.)
Quite often, like every other week, she says to me
'I can't see you friday because I'm seeing my girl friends' or something like that.
It could be any day or any excuse (a lot of the time it's work parties).
It's fine if it's in the week because we can just rearrange...
But it's annoying if it's friday/saturday because I have to find something else to do.
How do I deal with this? I'm happy for her to do her own thing, that's healthy.
But she's doing this to me every other week and it's getting annoying.
Last night she said 'I'm not seeing you friday'. I was like 'Fine, that's okay'. I went quiet after that and took her home. She asked me if I was okay because I wasn't talking much. I said I was fine.
Am I being sulky?
What should I do? Initiate a soft next for a while?
Any help would be appreciated.

Same question different day.