No, only if the force appears disproportional. Somewhere else in this thread our OP doesn't have a scratch, the other guy has like a broken nose and broken glasses. Now if no one else at that party steps up and says it was self defense, or consensual, and the guy bleeding says "I have been assaulted" what does the evidence tells us? The Police aren't fact finders. Their job is to simply ask "is their probable cause to believe this person committed a crime". The Judges are the fact finders, determining if such cases proceed and then later if it results in a conviction.
This is why I tell people, "don't let your pride get in the way. If you can walk away walk away." Don't care about the fact that, at the time, our OP was concerned girls would think he was a chump, or that the other guys buddies my call ya a wimp or coward. Self defense is to save yourself from Injury, not to save face.
Then you have the fact that many places make unsanctioned mutual fights illegal.
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