The look he slides over her is not one of easy acceptance. It is wary, still yet anticipating some additional clause. You are not alone, but --

Yet no modifier to the statement emerges.

He runs his tongue over his teeth, uneasy, considering his words.

"I am... accustomed to being alone. I have more experience living and working as such. Sometimes, it is easier."

Alone, nobody can betray you. Nobody can misunderstand and hurt you. Alone, you have nobody to explain to. You can work to your own schedule, achieve your own goals, do as you wish. There is merit in that.