Okay I find it pretty shocking since both of you are married :S
I don't know if you should get a divorce or not, but I think that you shouldn't allow yourself to live a lie.
You might also want to read a little bit about Body Language and falling in love.
Since I can't post links, please check out the links in my signature.
There's a section about Body Language, with very detailed, illustrated gestures. A definite must-see.
Good luck
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[URL="http://www.2knowmyself.com/relationship_breakups/why_do_we_fall_in_love"]Learn About The Psychology of Falling in Love[/URL]