Help This Reader Out--Girl's Got the Dopamine Sickness!

Yikes, I need your help! A reader has asked for advice and I don't want to totally fuck her up provide her with unwise counsel. So I turn to you, Faceless Internet Stranger, as I do on all Important Life Matters. Here, you tell her what to do.

This is what you have to go on, her comment on the post Dopamine, The Cruel Bitch Mistress:

Tell me how to make it stop. I've been married for 7 years now to a man who, 7 years before that was a crazy crush. He's a great guy, wonderful father to our little girl. All that. Then a dude came along who, with a GLANCE turned me inside out. We've flirted, we've talked, and he's told me I do the same to him. His integrity (dammit!) will not allow him to go any further with me, as he knows I'm married with a wee one. But, due to where I work and where said dude shops, I still see him and we still chit chat. It is driving me mad, making me seriously wonder if I still love my husband, getting seriously pissed off that I cannot work up passionate emotions for husband like I have for the dude, losing weight because I don't want to eat, etc. WTF am I supposed to do??? 
Going Crazy Here

Well, what should we tell this lady? Have any of you been in this situation? How did you handle it? Was your solution simple and elegant? Horrible and messy? Some combination therein? Any and all input welcome! You are welcome to comment anonymously (the Internet version of taking the Fifth), but I'll ask you not to be judgmental. The In Bed With Married Women philosophy is that the stuff we talk about around here is not Good or Bad--it's just True, and worth looking at with a clear and open mind.

Yours in Excessive and Unnecessary Capitalization,

jill

(photo source: Hoodoo That Voodoo, Photography by Sarah Moon)