I have a friend of 3 years, similar age, kids similar ages. We meet occasionally for meals out, kids play dates, etc and chat regularly. About 6 weeks ago we saw an event on FB that we would both like and she suggested we go as it was happening the day after my birthday and she would pay for my ticket as a birthday present. For the record I had bought her a lovely present and card for hers last month. We've mentioned the event a few time in the interim and I text her 4 days before asking what the plan was for meeting, etc. She said she'd let me know. I've had a shitty birthday week with sickness bugs in the house and was really looking forward to it. Event started at 7, she text me at 5.30 to say that her OH has just surprised her with tickets for a gig (that very minute) so she was going to that instead, very sorry, we'll go out another night etc. I replied essentially saying thanks but no thanks. She has let me down before, but nothing like this, so it's the straw that broke the camel's back really. AIBU to end the friendship?