Thank you all for your responses and input. I think I agree with you. I'm just going to leave it as it is, ponder some more, grow a pair and try to meet with him in person.
A letter To My Friend
Just my opinion here: Do you want your friend to tell you what to do? Judge your actions and decisions? Deride you if you leave the witnesses? If not then I suggest you don't try and change him/her either. That's what a real friend would do. No judgment either way. And I've heard of many people being given letters--going both ways; pro-JW and anti-JW--and I've never seen a letter have any effect aside from damaged friendships and hurt feelings.