I found out the girl i like likes my friend,what should i do?

One of her friends told me that she likes him and i don't know what to do or how i should feel about this.For a while it seem like she liked me(i think so anyway),she'd ask me to do something then add "For me?" at the end and one time when i tried to something heavy she said to be careful she didnt want me getting hurt.Maybe she was just being nice or her friends joking but it seems to real.If it is the truth that means shes been playing with my feelings and i should feel mad but its not like her to do that.....how should i feel?Should i tell my friend she likes him?