General

To be blunt - you either need to get a divorce ASAP, or cease all contact with this new guy (and even in the latter case, you should probably come clean with your husband). It sounds like the former is what you actually want.

Having your FFA side activated is no doubt envigorating, but it doesn't necessarily mean that your new friend would be a better long-term partner than your husband. After all, you've just met him - there could be many issues that are no obvious now that turn out to be serious impediments to long-term happiness. My advice would be to slow things down with your new friend so you don't damage your marriage beyond repair before thinking it through.