you know, if Adrian really was uncomfortable, he'd find some way to not be in the studio during your appointments. Sounds to me as though he's able to deal, so I don't think you should worry about him hating you or being uncomfortable. You're the customer -- if he's uncomfortable, that's his problem right now. I'm not saying that you're not accountable for your past actions -- you are -- but you are also accountable for your future actions. That means be cordial but impersonal and do not try to fix the friendship or go out of your way to talk to him. Just get your tattooing done and go back home to your husband. (this is my nonprofessional opinion, of course)