Why would a guy stand a woman up?


i met this guy online and we agreed to meet. He canceled once because he was sick. We agreed to go on a date again on a Friday. There wasn't a set place determined but we talked about time and what we would do just the day before. On Friday he didn't message me. I msged him in the evening and he didn't respond. I have him on Facebook too and he was online. He never responded to me. Then a week later he deactivated his Facebook but is still on the messenger app. I asked a friend to look him up and his profile is gone. Why would a man stand up a woman and then ignore her after? We talked for weeks.
Why would a guy stand a woman up?
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