So I went for an evening flight tonight. Lots of chatter before saddling up and on the taxi. Took up a guy who was a pilot too, but hasn't flown in a while. We went sight seeing in the local area. On run up, I failed to return the left mag to both. WTF was I thinking! Fixed that and departed. Moderate chatter about this and that. Decided to make a low approach to a close field. Got all set up, pulled up the plate for the GPS approach and flew the plate in VFR. Made my calls, about 3 miles out heard another aircraft call 10 miles out, entering on a 45 for the same runway we are using. Cool. Mid field on the low approach a plane on the ground gruffly tells us we are flying the opposite of what we are calling. Yes, I'm calling 36 the whole way but we are actually on the 18 approach end. I have never done that before. So I announce I'll climb straight out, heading 18 and depart the area west. Here is what I feel happened. I almost never have PAX in the cockpit. Having him there, I default to CFI in the right seat mode and "he'll keep me straight" if I screw up. Because that's what CFIs do, right? It's the only time my right seat is filled when I fly. I basically dropped my caution flags and felt confident in my skills. WTF was I thinking! We had a lot of chatter between us the whole flight. I was dividing my attention from flying the plane, showing him the sights and lost my situational awareness. I had the correct plate pulled up, but had mentally wanted 36 because it has a better view for him on approach. Before the approach, he was checking out Foreflight and hit the AHRS screen calibration button on the iPad in front of him. I have two in the plane. It ended up with an unusual attitude displayed. And, it then crossed filled to my iPad in front of me so now mines out of whack too. I didn't let it get to me, but I realized that I have heavily depended on using FF to get me to the destination airport. No flight plan was on the FPL and thus, no runway centerline extension lines. This flight was not normal because I always have a plan loaded except for closed pattern work. I was expecting the lines and remember looking, but I never verified my approach on the DG or the compass. I feel completely like a terd and know better than to let my cockpit degenerate like that. I wanted him to have a great flight and failed to manage my pax and let him tinker with systems he was unfamiliar with. I let him dictate my flying and I really hate that feeling. Like, really, really hate what I did. I know better and failed to appreciate where this flight had gone. I can only hope my experience may help someone else realize what can happen to you when you don't manage your airplane AND pax.