My friend decided to lie about cheating with another girl when he was confronted with clear evidence
Wow that must have been awkward.  You can't really argue with the evidence sitting right in front of you.
No, you can't. It's especially awkward when you all know each other well. It makes me sad, honestly
Yea it's always sad when a relationship doesn't work out.  Hopefully in the future he can be more honest.