If he usually acts normal around you, but all the sudden he has started acting weird and awkward, it is probably because he likes you and may not know how to show it.
He always tries to get your attention and impress you, especially when he’s being funny or trying to do something impressive.
Romantic gestures, no matter how small, are a sign that he has feelings for you. Maybe he has sent you flowers when you were going through a difficult time.
His behavior may be odd, but he is most likely fighting his feelings for you and so he just is not sure how to act.
If he really likes you, then chances are he has told his closest friends. So, if they hint like he talks about you, or they give him grief when you’re around, take note.