Hi Erin, welcome to the thread 
I assume when you started your thread with “Requesting Sanity Check” you meant you were looking for some perspective on your situation? That’s the assumption I’m going on here; feel free to correct me if I misinterpreted you.
I am the same. The intrigue, the tease, the forbidden, the fantasy: it’s all a secret world in my head that I escape to when I’m in my addiction.
The phrase “checking out” can mean so many things to so many people. It can be interpreted physically, but it can also be interpreted mentally and emotionally.
I am speaking for myself here; I am not speaking for any program or philosophy. Just myself and my experience.
Physical checking out (of any type) has never been necessary or helpful for me. In fact, it is and always has been harmful for me. The behaviour of physically checking somebody out has always become a fantasy thing in my mind, where I take a mental picture, and then in my thoughts I can have anything I want at any pace (or place) in any way, and I don’t have to understand anything or sacrifice anything. I can have everything in my fantasy, and for me, physical checking out has always eventually connected to fantasy, and I get lost in there.
I actually think letting go of my practice of physical checking out has helped me focus on understanding people and making healthy sacrifices, to be humble and helpful. All of that, for me, starts by remembering that my purpose for being here, my reason for being human, is to be helpful (and I can’t be helpful to anybody, myself included, if I am holding on to the behaviour of checking people out; it fills my glass with distraction and there’s no room left for constructive connection and growth).
I have a lot of faith in the universe. The seeds in the forest don’t worry about finding the ground and sprouting; the leaves in the trees don’t worry about whether the rain will come. Why should I worry about making the interpersonal connections I need to make? If I just focus on being the person I am, on being true and authentic (which also involves asking questions and learning), the rest will take care of itself. I can get involved in volunteering and community stuff, either directly or indirectly (for example, as a contributor of crafts or poetry), and I will meet people at the level of the mind and the emotions, and those are the levels where I truly, authentically connect with people.