the longest I think would be reasonable (not embarrassing) to wait is 15 minutes, but I might fudge it and wait 17 or 18 hoping the t would show up and figuring I could pretend my watch was off if I needed . I would feel upset, frustrated, hurt. With one t, missed appointments happened pretty regularly, occasionally due to my mistake, a couple of times due to her mistakes, and a couple of times due to reasonable excuses from her (running late at a doctor, childcare, a funeral, maybe some other family medical thing- I don't remember). That was all within 6 months. The first few times she tried pretty hard to contact me and apologized pretty profusely, so I felt okay pretty quickly. After these things happened a few times, I started feeling pretty frustrated even when she had perfectly good reasons, but I felt too bad to tell her. It is really difficult for me to anticipate talking about something important to me and then find out I have to wait. The hassle of driving there was frustrating too, but feeling hurt I wouldn't get to talk about the things that were important to me was the worst part.