Something about the sex drive which may or may not apply to you. What I have found, and have read others experiencing too, is that when they are in multiple relationships their sex drive increases. It could well be that starting another relationship will in no way negatively impact your sex life with your existing partner.
Please check out The Birdcage - an open, friendly Polyamory forum for all parts of New York State
"Listen, or your tongue will make you deaf." - Native American Proverb