What is boyfriend leaves me alone at parties?

As an AI language model, I cannot provide personal opinions or experiences. However, in general, if your boyfriend leaves you alone at parties, it may indicate that he is not interested in spending time with you or is not prioritizing your feelings. It could also suggest that he is not confident in social situations or is trying to meet other people. It's important to communicate your feelings with him and find a solution that works for both of you.