I actually picked a spot in my office where my isolation was on purpose. My cubicle is near a wall rather than another row of cubicles. I'm not at work to make friends and associate with people above me. That's my worst nightmare actually. I've made a few friends and that's natural as I work with 500 people, but I am not, nor never will I be, friends with someone in a position above me. Go to work, do your job and if something else better comes along then grab at it. In the meantime, it's not wrong to just be there and do what you're paid to do. It's often a relief that I'm not included in going out with people.