The only sure fire why to know, is to ask her. You could try going off of body language, like if she stares at you or smiles at you. But you'll never know until you ask.
What if you want to go out with a girl or her friend but you don't know which one likes you?Read more: What_if_you_want_to_go_out_with_a_girl_or_her_friend_but_you_don't_know_which_one_likes_you
Ask her.
kiss her
possibly. I know a lot of guys who talk about the girl he likes constantly
Get to know her, if she seems to relate to you date her but its up to you to decide
ok, I'm a girl and if he's talking to the girls friend he's making a BIG mistake because the girl, especially if she likes him back will think your not interested in her and interested in the friend. he should feel comfortable when he talks to the girl he likes and let her know how he feels cause he's making things worse not talking to her
if he talks more to you then he likes your friend because guys are shy so they do not talk to the girl they like. So if the guy talks more to your friend then he likes you.
He spends less time with his girl and spends more time with you.
She likes you and that other guy and her boyfriend but does not know who she likes best.
if you know one of her friends (the girl who doesn't like you) one that you KNOW likes you ask her
If you know she likes your friend more then you, it's too bad but you should probably move on to someone better who is crushing on you!
I think she will look to you and laugh or make eye contact with you so then