Hang on... you didn't say she didn't give you support the weeks leading up. You said she cancelled before that appointment because she got sick. Those are two drastically different stories. In your original post, you expressed she had said she would walk you to the gate if necessary and that you all had been working on this trip.I didn't need help when she was puking. I needed help any of the weeks leading up to it and af...
I don't think anyone here is trying to be hard on you or less sensitive. For me, I would just like for you to work through this without it tearing you apart and in the end giving you a better understanding of future relationships. Life is not linear, nor are relationships. They are complex and you have to see the black and white thinking as unhealthy. The second you felt challenged here you gave up and said "you are all right I expect too much...." Think about that...it doesn't solve anything bc you still feel badly. Maybe you could come up with some other ways you can work through this?
Sending you support and hope that things will become more clear. Hang in there!!!