I would like to add to your advice to Don aka Nod. I too am in a committed relationship, and like any red blooded male I look at a sexy woman and think Be Jazus it’s me that would like a piece of that, and that’s as far as it goes. By saying you are in a committed relationship and then admitting you cheat shows what a weak person you are.
You must be one who when a girl says “Hello Sexy Man” you believe them. Like the Gaffer said to the truck driver, “Pull out Driver you’ve got your load”. (Think about that one.)
I think you are being a very naughty boy. I want you to stay in after class and explain all this truck driver thing to me. I think it must be something to do with sheeting and tying that I am told all truck drivers do. Am I correct? Are they practicing some weird form of S&M or something. However, congratulations for keeping all that libido in check.