What to do if you accidentally told a girl you like her but you don't know if she likes you?

you cant "accidentally" tell a girl you like her..if you said it,it was meant to be said.i would say,just let it go,if she likes you,she will let you know sooner or later..trust me :) and if she doesnt say anything then she doesnt like you and the best thing to do would be to just back off a bit;she will probably feel uncomfortable around you but she would still be your friend.