This letter is amazing. I would most likely never send this to someone....but that doesn't mean I haven't thought all of this in my head!
Here is a short exeprt
"If you don't want to go out again, that I request that you call me and make a sincere apology for leading me on (i.e., giving me mixed signals). In my opinion, you shouldn't act that way toward a man and then not go out with him again. It's bad to play with your hair so much and make so much eye contact if you're not interested in going out with me again. I have tried to write this email well, but it's not perfect. "