I have been married 19 years, and just started an affair, I love my husband but "want" this man? any advice?

I met my new guy last year at a fire convention and it was like fireworks. We are both married and yet crazy for each other, but also content with life as it is. I have never done this before and now it has been going on over a year. I am a law professor and he a fireman and professional business owner. Why are two adults acting like love sick kids? I do not know who I am becoming? any one ever had something this insane going on?