"friend" pretended not to see me

Anyone have this experience? What do you think it means?

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It could mean many things. For example that they don't want to deal with anyone at the moment or they are with someone or wait for someone and don't want them to see them with you. Idk, people can be pretty weird and asocial. I know I am but still..I don't think I would do this to a real friend that I like. As you say, this person is just "friend".