Wow, 10 years of suppressed feelings! That's gotta make you a little tied up inside! Well done for being brave and telling your husband about loving his best friend. How has things been going since?
My feelings for a mutual friend of mine and my hubbie's is what got me talking to hubbie about having more than one relationship. I didn't wait 10 years though! Only like 1 year. My crush has moved to Germany for 3-4 years now, so that option is well off the radar for now.
It will be interesting to see how things pan out for you.