Friend organised a night out about two weeks ago for Saturday - she did this via fb as a group message. When I saw her I said I'd come this was about a week ago.
Last night she updated the message and asked who was coming. I said I couldn't now as I'd been invited to a friends house for drinks as she's having a small leaving do (as she's going to Canada for a year). If I don't go to that I wouldn't see her again for a very long time and no time to see her inbetween as she's obviously very busy.
Told friend my exact reason for not coming and have sent her two texts apologising - which she had ignored. Now I don't have form for letting people down at the last minute and there's no way I'd have ditched the night out if it wasn't for a leaving party.
The night out was just that - an ordinary night out that can be done on any night and another friend is going so it's not like she can't go out at all now.
Aibu to think its childish to ignore me or have I actually done something really horrible?