well maybe he was just being friendy
If your boyfriend likes your best friend he is always around her, and only is around you when your with her/him. If he asks "Is Alice there?" And you say no and he doesn't come.. Or if you say yes and he does.. Then, you know he likes her.
by the way your crush acts and looks around your friend
Well for him it is probably awkward to be around you, or he may not care. But if he likes your best friend and she likes him, let them be. But if your best friend doesn't like him the way he likes her he'll hopefully get the hint and move on to you. But for now lay low and try not to get in the way, but still talk to him and have a friend relationship. If you try to make him not be around you BFF he may like you less after that.
Acts different around you
Ask if you like him for him, or like him because your best friend likes him - then either ask him out, or do not.
If he acts different around you then the way he did before
Asher is Jonas's best friend that likes to play around
You have to tell them
it means your crush likes your best friend
ask your best friend if he likes him and if she doesnt than wait for him to get over it and he'll realize he likes you
stay out of it its not ur problem
You tell him that your best friend likes him too,and tell yo best friend to ignore him he'll eventually love you