Acting “weird” is most often the result of a guy being very nervous around a girl he has a crush on. Stammering and making jokes are common. There are few guys who are able to approach a girl they really like totally calm, primarily because guys hate rejection. They hate to make themselves vulnerable to a girl, and then get shot down. This nervousness, or acting weird comes from this place of not knowing exactly how to balance their fear and their excitement, so the guy gets nervous and tongue-tied.
This is the reason guys will flirt with girls. They will drop hints here and there to see how the girl will react. This way, it’s easier to know what the girl is thinking when he sees how she responds to his flirting.
Why do guys act weird around a girl they like?