That's a win for you, saidso! We teach people how to treat us by our reactions to their sometimes terrible behavior. In this case, your acquaintance tried to take advantage of you by putting your needs second, but you called them out on it, by holding them accountable and with a consequence: you will not wait around for them b/c you value your own time! Good for you! I ended a friendship after 4 years of putting up with her chronic lateness, once I realized she didn't value me as a friend for constantly being late all the time, especially on my birthdays, etc. except when it was convenient for her.