I'm going to file a missing persons report for my best friend
Is your best friend really missing?
No, I'm sure they're fine.
You should not file a missing person report for someone if they're not really missing. You should do it only if it is true since it is taking up police resources.
I'm sure it will be fine, it will be funny.
If your friend is not really missing, don't file a report. You may think it's funny, but it's a waste of the police departments time. Call your friend and tell them you want to speak to them more often.