Why would a man give you mixed messages?

If he chased you for a year online and in person and says stuff like ‘We should do that sometime;’ and ‘Are you looking forward to Friday night;’ tells you that all the signs he previously gave you were signs of interest and then refers to himself as your friend, which he isn’t, says he’s already dating someone and he was joking, what does this mean? Is he trying to be my friend, messing with me or interested and scared to admit it?

Why would a man give you mixed messages?
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