dealing with transference and bored in current relationship

I have been in a relationship with a guy for six years now. He has always treated me well, but he doesn't care to improve himself at all. I plan on going back to school next year myself. I'm 25 and he is 27, so we don't have our lives figured out just yet.
Honestly, I would probably try to move on without him if we didn't have a house and a child together.
I was content with our relationship until this past summer. I started feeling an attraction to a surgeon that operated on me.
The surgeon is in his late fifties and probably married. I am no longer seeing him, but I regret not getting to know him.
I keep thinking about how he threw back my gown one night, exposing my chest. He accidentally brushed his hand across my nipple, and then just stopped and looked at it for a minute, not even bothering to cover me.
On a separate occasion, he came into the room while I was taking a shower. I had the door cracked, but didn't see him. I just heard him come in and I know he stayed in the room for a few minutes.
I won't ever see him again, but I want to send him a message. I know that would not be a good decision.
How can I get over this attraction to a man I barely know?
How can I mend my broken relationship?

Within time you will get over him, and possibly become angry with him for not sticking to his professional boundaries at work.

If you two are meant to be together, you'll both find a way of working this out, every relationship has it's difficult times, maybe you'll both get through this, maybe you won't.

But you know yourself, this surgeon isn't anywhere near your age, and you don't know if he does this to all the young females he operates on, he might be a womaniser, even a predator, in a way, sending an email to him won't be a good idea, he'll probably have to delete it so he doesn't get caught out, but if you must insist in contacting him, I'd send the email via his manager, that way you'll make sure he gets the email, and he will also be investigated aswell, because it sounds like he needs to be.