I had this thing and she asked me and i lied i said i didn't and now i try telling her something she doesn't believe me anymore... help me if u can please>!!!
Well you have to give her time. Once you lie, that really breaks the trust. So you have to accept that she may not believe you for awhile. As long as you stay real and a good friend, everything should be fine in the long run.
Its a big problem as ur frnd can feel betrayal..so try to make her understand about the situaton when u lied... n ofcourse she will understand cause she is ur friend.....it may take time..but she will...