I want to know if a girl likes me back?

there is this girl i really like, i told her i like her and she said "awww but im sorry to break it to u but i sorta have a bf." we sit next to eachother on the bus and we always catch eachothers eyes and we just stare at eachother then look away, sometimes she smiles and twinkles her fingers wen she waves to me...does that mean she likes me too?