A buddy crush is a desire to be best friends with someone else. The majority of this is similar to a typical crush in that everytime you see your friend crush, you fantasize about your prospective life together as best friends. However, since they have a favorite person, there is no chance of them having a romantic interest in you. They are harmless fantasies and don't necessarily mean that your friend likes you back. They are just fun ideas for stories to tell each other later. Sometimes people create fictional characters to help them understand themselves better or to see what kind of relationship they would have with another person. Since most crushes are not acted upon, creating a character to represent one's crush allows for some emotional release without putting any actual effort into it. If you think your friend might be interested in you, then by all means, go for it! But if they say they aren't looking at anyone right now, then leave them alone.