Does he like her???

My friend haves a crush on a boy.He looks at her a lot and one time he even almost felt of the stairs when he was looking at her.And always when he walks on the stairs he pushes people but he never didnt her.Also one time when some boy started yalling at her he comed and kicked him.So what do you think,does he like her.But she haves a problem,her frined also haves a crush on him but the last time they had a crush on the same boy they had a big fight and were enemys very long.What should she do?