Jenni,
I understand why you don't want to, but you may not be his first or his last. Even if he was your best friend, he violated the law and you.
A friend was raped by her own son, and she never reported it, because she was shamed to be so vulnerable to her own son. She did not want people to know. So she sold her house and moved to a new area. She left her friends and other family, and is now alone.
I have never heard of a single victim, regardless of the outcome, that wished they had not gone to court. But you do heard of victims who commit suicide or go insane emotionally because they did not want to deal with it.
You will have to deal with it at sometime, in one way or another. I can only wish you well and encourage you stop stop this monster now.
Hugs Sister