Does it mean that a man isn't interested in you if he doesn't ask for your number after a conversation?

A guy stopped to have a conversation with me as I was standing alone. I thought our conversation went pretty well, but he didn't ask for any of my socials or phone number before he left. Does this mean he wasn't interested in me?

Does it mean that a man isn't interested in you if he doesn't ask for your number after a conversation?
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