AIBU to keep my charity shop shift on a friend's birthday?

[bagpuss90]

It’s my friends birthday this Friday - now I volunteer in a charity shop on Fridays. A cpl of weeks ago I asked her if she wanted to do something that day because if I had enough notice I could swap my day. She said no - she was going to go out with her DP. All good til this week - he has let her down and she’s asked me to go for lunch with her. If I don’t go to work at the shop that day they literally won’t be able to open as there won’t be enough stafff. I’ve offered to go out on Friday evening with her but she seems to think as it’s a voluntary role then I can just bail out at any time . I feel really bad - but if every volunteer let people down it would be chaos . Who is being unreasonable ?

Shop comes first i wouldn't hesitate for a second

You’re being a bit wet, @bagpuss90. I mean, she’s treated you like a fallback option, been rude that you wouldn’t cause a charity shop to close because she changed her mind at no notice, and now you’re falling over yourself offering her different dates and times, as if you’re terrified to say no. I mean, no wonder she thinks she’s entitled to your time if you also think so!

She’s cheeky! Not only did you ask her in advance, she has made it clear that you’re the second best choice for her birthday. No way should you let the charity shop down.