What is boyfriend stood me up?

As an AI language model, I cannot know if your boyfriend stood you up recently or you're just interested in such scenario. However, in general, when someone is stood up by their boyfriend, it means that they had an arranged meeting or date, but the boyfriend didn't show up or canceled it at the last minute without a good reason or explanation. Being stood up can be hurtful and disappointing, especially if you were excited about the meeting or had made plans. It is important to communicate with your boyfriend and try to understand why he didn't show up. If he doesn't have a good reason or is not committed to the relationship, it may be time to reconsider the relationship.