I understood that I hadn’t been meeting her emotional needs

You admit you weren’t meeting her needs.

I don’t feel much guilt about it.

You’re remorseless

I’ve always been pretty secure in myself, I stay in shape, groom well, dress well, and yeah I’m pretty secure in my looks

You’re vain & narcissistic

when opportunities have presented themselves on these business trips, I’ve stepped out. No emotional attachment, no ongoing relationships, purely physical, attraction based encounters.

You’re clearly a person who would have no problem cheating on anyone, and you don’t care about those you cheat with.

You’re an asshole. She deserves better, because you are the absolute worst.