I'm going to insist my missing friend was obviously fine and busy with friends when she was actually in a very very bad condition
Why would you sabotage a missing person's report?
I don't care for them at all
You are responsible for your friend's disappearance now, don't you know? All your lies to your friends and authorities hinder her being found, and you are a reason if she gets murdered if they could have found her without your deceit.
What do you mean? It's my best friend and I want her to get home asap.
Your concern with getting her home ASAP conflicts with your blase attitude about hiding pertinent information about the situation. Your behavior is both immoral and likely criminal. I would reconsider how you're handling this if I were you.