Thank you for sharing that email. I like very much how you expressed yourself. For me, it is something I want/need to say in person. I think I will first broach it using the term "exclusivity" and how I am not ready for that and want to explore other options at this time in my life -- and then let the conversation evolve from there (truth is, I'm not crazy about the term polyamory, or putting a label on it at all, although I'm glad it exists so I could find this forum). I feel the need to see his face and touch him when I talk to him about our relationship (and other things I need to tell him).
Anyway, circumstances have/are preventing me from getting together with this man for a little while, so I should have plenty of time to think through my talk with him, LOL.