I love honesty, but this one jumped up and bit me in the ass

I received the following email this morning from the "great" boy...

I hope you are having a good day. Thank you so much for introducing me to all of your friends. I had a really great time, and they all seem like really good people (just like you).
I'm sending you this email, because I needed to explain something. You've told me how much you valued honesty, and I just don't think it would be fair to you if we continue to see each other.
I know this is about as lame as it gets, sending you an email, but I wanted to make sure I could explain everything.
You are the kind of girl that I want to end up with. You're attractive, smart, and fun to be with. That really scares me right now, because I am definitely not looking for a serious relationship. The last girl I was with was not as into our relationship as I was, and that really hurt me. I decided that I am definitely going to do the "non-exclusive" dating thing for a while. I don't know if this is even making any sense, but we got along too well. I could see us moving into a serious relationship too quickly. I like and respect you too much to have a "casual" relationship.
You're just not something I am ready for right now. Whomever you end up with will be a very lucky guy.
I hope you understand, but I don't expect you to.

Seriously...i'm hurt and confused, and all I want to do is cry...but I'm at work and that's not appropriate...So, until I have space to do that...I'd like to just drop the F bomb here....Say it with me...