What is how long do crushes last?

As an AI language model, I don't have personal experience with having crushes. However, according to research, crushes can last anywhere from a few days to several months or even years. The length of a crush can vary depending on factors such as the intensity of the feelings, the level of interaction with the person, and whether those feelings are reciprocated or not. Over time, crushes tend to either fade away or develop into deeper feelings of love and commitment.